diff --git a/pkg/gocui/view.go b/pkg/gocui/view.go
index 1dd1aabb2..337826b2b 100644
--- a/pkg/gocui/view.go
+++ b/pkg/gocui/view.go
@@ -2339,6 +2339,11 @@ func (v *View) SelectedLineIdx() int {
 	return seletedLineIdx
 }
 
+// IsLineVisible reports whether the given view line is one of those on screen.
+func (v *View) IsLineVisible(viewLine int) bool {
+	return viewLine >= v.OriginY() && viewLine < v.OriginY()+v.InnerHeight()
+}
+
 // MiddleVisibleLineIdx returns the view line halfway down the visible content. It
 // stands in for a cursor in a view that has none: of the lines on screen, the one in
 // the middle is the likeliest to be the one being read.
diff --git a/pkg/gui/controllers/context_lines_controller.go b/pkg/gui/controllers/context_lines_controller.go
index 022364c07..f7077b299 100644
--- a/pkg/gui/controllers/context_lines_controller.go
+++ b/pkg/gui/controllers/context_lines_controller.go
@@ -83,6 +83,11 @@ func (self *ContextLinesController) applyChange() error {
 	case context.STAGING_MAIN_CONTEXT_KEY, context.STAGING_SECONDARY_CONTEXT_KEY:
 		self.c.Refresh(types.RefreshOptions{Scope: []types.RefreshableView{types.STAGING}})
 	default:
+		// The diff is about to be rendered again with more or less context around
+		// each change, which reads as the lines you were looking at moving up or down
+		// the view; keep them where they are instead.
+		self.c.Helpers().DiffLine.PreserveDiffPositionOnRerender(self.c.Contexts().Normal.GetView())
+		self.c.Helpers().DiffLine.PreserveDiffPositionOnRerender(self.c.Contexts().NormalSecondary.GetView())
 		currentContext.HandleRenderToMain()
 	}
 	return nil
diff --git a/pkg/gui/controllers/helpers/diff_line_helper.go b/pkg/gui/controllers/helpers/diff_line_helper.go
index 212cbff0b..533b63127 100644
--- a/pkg/gui/controllers/helpers/diff_line_helper.go
+++ b/pkg/gui/controllers/helpers/diff_line_helper.go
@@ -66,14 +66,21 @@ func (self *DiffLineHelper) GetDiffLineInfo(view *gocui.View, viewLineIdx int) (
 // (a side-by-side row shows a deletion and the addition replacing it); the leftmost
 // is the one a reader would call the row's own, so it is the row's identity.
 func (self *DiffLineHelper) diffLineInfoFromRecords(metadata []string) (types.DiffLineInfo, bool) {
-	if len(metadata) == 0 {
+	identities := self.diffLineIdentitiesFromRecords(metadata)
+	if len(identities) == 0 {
 		return types.DiffLineInfo{}, false
 	}
-	parsed, ok := parseDiffLineMetadata(metadata[0])
-	if !ok {
-		return types.DiffLineInfo{}, false
-	}
-	return self.diffLineInfo(parsed), true
+	return identities[0], true
+}
+
+// diffLineIdentitiesFromRecords recovers the identity of every diff line the row's
+// records state, left to right. Which of them a reader is after depends on the
+// reader: the one the row leads with is the row's own identity (see
+// diffLineInfoFromRecords), while a reader looking for a particular line has to
+// consider them all, since which of a modification's two halves leads a row is up to
+// the rendering.
+func (self *DiffLineHelper) diffLineIdentitiesFromRecords(metadata []string) []types.DiffLineInfo {
+	return self.diffLineInfos(parseDiffLineRecords(metadata))
 }
 
 // resolvedDiffLine is one rendered row's recovered identity, plus whether it could
@@ -86,36 +93,59 @@ type resolvedDiffLine struct {
 // resolveDiffLines recovers the identity of every row of a rendered diff in one
 // pass, indexed 1:1 with contents. It is the batch form of GetDiffLineInfo, for the
 // whole-buffer scans (which change lines are where, which file each row belongs
-// to), and reads the rendering the same way: by the renderer's records, or by
-// parsing it as a unified diff (see renderingStatesDiffLines). Resolving row by row
-// would re-run the buffer parser's whole-section parse once per row — O(n²) on a
-// large single-file diff — so the buffer parser runs once for the whole buffer.
+// to). A row's identity is the line it leads with, of those resolveDiffLineIdentities
+// finds on it.
 func (self *DiffLineHelper) resolveDiffLines(contents []gocui.DiffLineContent) []resolvedDiffLine {
 	resolved := make([]resolvedDiffLine, len(contents))
-	if renderingStatesDiffLines(contents) {
-		for i, content := range contents {
-			if info, ok := self.diffLineInfoFromRecords(content.Metadata); ok {
-				resolved[i] = resolvedDiffLine{info, true}
-			}
-		}
-		return resolved
-	}
-
-	for i, parsed := range parseAllDiffLinesFromBuffer(diffLineTexts(contents)) {
-		if parsed.ok {
-			resolved[i] = resolvedDiffLine{self.diffLineInfo(parsed.parsed), true}
+	for i, identities := range self.resolveDiffLineIdentities(contents) {
+		if len(identities) > 0 {
+			resolved[i] = resolvedDiffLine{identities[0], true}
 		}
 	}
 	return resolved
 }
 
+// resolveDiffLineIdentities recovers every diff line each row of a rendered diff
+// shows, in one pass, indexed 1:1 with contents. It reads the rendering the way
+// GetDiffLineInfo does, by the renderer's records or by parsing it as a unified diff
+// (see parseDiffLineIdentities), and is the form of the batch resolver for the
+// readers that can't settle for the line a row leads with: looking for a remembered
+// line in a new rendering has to consider both halves of a modification, since a
+// side-by-side row leads with the deletion whose addition was what got remembered
+// under a unified one.
+func (self *DiffLineHelper) resolveDiffLineIdentities(contents []gocui.DiffLineContent) [][]types.DiffLineInfo {
+	identities := make([][]types.DiffLineInfo, len(contents))
+	for i, parsed := range parseDiffLineIdentities(contents) {
+		if len(parsed) > 0 {
+			identities[i] = self.diffLineInfos(parsed)
+		}
+	}
+	return identities
+}
+
 // diffLineInfo turns a parser's result into the absolute-path identity consumers
 // work with. The path arrives repo-relative from the diff header, but a renderer
 // states it however it likes, absolute paths included.
 func (self *DiffLineHelper) diffLineInfo(parsed parsedDiffLine) types.DiffLineInfo {
+	return diffLineInfoIn(self.c.Git().RepoPaths.WorktreePath(), parsed)
+}
+
+// diffLineInfos is diffLineInfo over every line of a row.
+func (self *DiffLineHelper) diffLineInfos(parsed []parsedDiffLine) []types.DiffLineInfo {
+	infos := make([]types.DiffLineInfo, len(parsed))
+	for i, line := range parsed {
+		infos[i] = self.diffLineInfo(line)
+	}
+	return infos
+}
+
+// diffLineInfoIn is diffLineInfo against a given worktree, for the callers that can't
+// ask which repo we are in where they run: a repo switch replaces it, so only the UI
+// thread may read it.
+func diffLineInfoIn(worktreePath string, parsed parsedDiffLine) types.DiffLineInfo {
 	path := parsed.Path
 	if !filepath.IsAbs(path) {
-		path = filepath.Join(self.c.Git().RepoPaths.WorktreePath(), path)
+		path = filepath.Join(worktreePath, path)
 	}
 
 	return types.DiffLineInfo{
diff --git a/pkg/gui/controllers/helpers/diff_line_parser.go b/pkg/gui/controllers/helpers/diff_line_parser.go
index dd7270af2..8f8420d97 100644
--- a/pkg/gui/controllers/helpers/diff_line_parser.go
+++ b/pkg/gui/controllers/helpers/diff_line_parser.go
@@ -125,6 +125,46 @@ func renderingStatesDiffLines(contents []gocui.DiffLineContent) bool {
 	})
 }
 
+// parseDiffLineRecords parses the records a row carries, left to right, leaving out
+// the ones we don't understand. A row carries more than one when the rendering puts
+// two diff lines on it, as a side-by-side row does with a deletion and the addition
+// replacing it.
+func parseDiffLineRecords(metadata []string) []parsedDiffLine {
+	parsed := make([]parsedDiffLine, 0, len(metadata))
+	for _, record := range metadata {
+		if line, ok := parseDiffLineMetadata(record); ok {
+			parsed = append(parsed, line)
+		}
+	}
+	return parsed
+}
+
+// parseDiffLineIdentities recovers, for every row of a rendering, the diff lines it
+// shows, indexed 1:1 with contents; a row that shows none we can place gets an empty
+// entry. The rendering is read the way renderingStatesDiffLines settles: by the
+// renderer's records, every one a row carries, or else by parsing the rendering as a
+// unified diff, where each row shows one line. Each file's section is parsed once;
+// resolving row by row would re-run that parse once per row, O(n²) on a large
+// single-file diff.
+func parseDiffLineIdentities(contents []gocui.DiffLineContent) [][]parsedDiffLine {
+	identities := make([][]parsedDiffLine, len(contents))
+	if renderingStatesDiffLines(contents) {
+		for i, content := range contents {
+			if parsed := parseDiffLineRecords(content.Metadata); len(parsed) > 0 {
+				identities[i] = parsed
+			}
+		}
+		return identities
+	}
+
+	for i, parsed := range parseAllDiffLinesFromBuffer(diffLineTexts(contents)) {
+		if parsed.ok {
+			identities[i] = []parsedDiffLine{parsed.parsed}
+		}
+	}
+	return identities
+}
+
 // fileSectionBounds returns the half-open range [start, end) of the file section
 // containing targetIdx: the nearest line starting a section at or above it, up to
 // where that section ends. start is -1 when targetIdx is above the first file
diff --git a/pkg/gui/controllers/helpers/diff_line_parser_test.go b/pkg/gui/controllers/helpers/diff_line_parser_test.go
index f320a6ef5..5c5c41297 100644
--- a/pkg/gui/controllers/helpers/diff_line_parser_test.go
+++ b/pkg/gui/controllers/helpers/diff_line_parser_test.go
@@ -420,3 +420,61 @@ func TestRenderingStatesDiffLines(t *testing.T) {
 		})
 	}
 }
+
+func TestParseDiffLineIdentities(t *testing.T) {
+	row := func(text string, records ...string) gocui.DiffLineContent {
+		return gocui.DiffLineContent{Text: text, Metadata: records}
+	}
+
+	t.Run("a rendering with records is read by them alone", func(t *testing.T) {
+		// A renderer's picture of a commit that adds a test whose input is a diff. The
+		// test's "diff --git" line is an added line of the test's file and is shown on
+		// a row of its own, and the rows the renderer puts between hunks carry no
+		// record. Parsed as a diff, that row would open a section of a file the diff
+		// doesn't have and claim every untagged row below it.
+		contents := []gocui.DiffLineContent{
+			row("src/parser.rs", "1;f;;;src/parser.rs"),
+			row(`let input = "\`, "1;c;10;;src/parser.rs"),
+			row("diff --git a/img.png b/img.png", "1;a;11;;src/parser.rs"),
+			row("Binary files a/img.png and b/img.png differ", "1;a;12;;src/parser.rs"),
+			row(""),
+			row("fn later() {}", "1;c;40;;src/parser.rs"),
+		}
+
+		assert.Equal(t, [][]parsedDiffLine{
+			{{Path: "src/parser.rs", Type: types.DiffLineFileHeader}},
+			{{Path: "src/parser.rs", Type: types.DiffLineContext, NewLine: 10}},
+			{{Path: "src/parser.rs", Type: types.DiffLineAdded, NewLine: 11}},
+			{{Path: "src/parser.rs", Type: types.DiffLineAdded, NewLine: 12}},
+			nil,
+			{{Path: "src/parser.rs", Type: types.DiffLineContext, NewLine: 40}},
+		}, parseDiffLineIdentities(contents))
+	})
+
+	t.Run("a row with two records shows both of their lines", func(t *testing.T) {
+		contents := []gocui.DiffLineContent{
+			row("two │ TWO", "1;d;2;2;file1", "1;a;2;;file1"),
+		}
+
+		assert.Equal(t, [][]parsedDiffLine{
+			{
+				{Path: "file1", Type: types.DiffLineDeleted, NewLine: 2, OldLine: 2},
+				{Path: "file1", Type: types.DiffLineAdded, NewLine: 2},
+			},
+		}, parseDiffLineIdentities(contents))
+	})
+
+	t.Run("a rendering without records is parsed as a diff", func(t *testing.T) {
+		bufferLines := strings.Split(twoFileDiff, "\n")
+		contents := make([]gocui.DiffLineContent, len(bufferLines))
+		for i, line := range bufferLines {
+			contents[i] = row(line)
+		}
+
+		identities := parseDiffLineIdentities(contents)
+		for i, parsed := range parseAllDiffLinesFromBuffer(bufferLines) {
+			assert.True(t, parsed.ok, "line %d", i)
+			assert.Equal(t, []parsedDiffLine{parsed.parsed}, identities[i], "line %d", i)
+		}
+	})
+}
diff --git a/pkg/gui/controllers/helpers/diff_line_restore.go b/pkg/gui/controllers/helpers/diff_line_restore.go
new file mode 100644
index 000000000..769364e0e
--- /dev/null
+++ b/pkg/gui/controllers/helpers/diff_line_restore.go
@@ -0,0 +1,312 @@
+package helpers
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/gocui"
+	"github.com/jesseduffield/lazygit/pkg/gui/types"
+	"github.com/jesseduffield/lazygit/pkg/tasks"
+	"github.com/samber/lo"
+)
+
+// Keeping a diff view where it is when the same diff is rendered again differently.
+// The line the user is on is remembered by identity (diff_line_helper.go), because a
+// new rendering puts it on a different line of the view — and may not have it at all,
+// which is what the fallbacks below are for.
+
+// diffLineAnchor is a line for a restore to land on: the identity to find it by in
+// the new rendering, and the screen row it was on, so that it can be put back there.
+type diffLineAnchor struct {
+	identity types.DiffLineInfo
+	row      int
+}
+
+// PreserveDiffPositionOnRerender remembers where a diff view is and puts it back
+// there as it next re-renders, instead of leaving the user at the top of a new
+// rendering of the diff they were already reading. Call it on the view about to be
+// re-rendered, right before triggering the re-render — on both panes of the main
+// window where both are being rendered again, since either of them may hold the diff
+// being read; a pane that isn't showing is left alone.
+//
+// The line to keep is the selected one, and the middle visible line when there is no
+// selection or it has been scrolled out of sight — what the user is looking at, rather
+// than the view's top edge or a selection they have long since left behind. It may not
+// survive the re-render: a context line goes when the context size shrinks, and a
+// whole hunk or file goes when whitespace stops counting. So the lines around it come
+// along as fallbacks and the view lands on the nearest one that is still there, put
+// back on the screen row it was on. With none of them left — and with a renderer that
+// says nothing about its rows there is nothing to look for in the first place — the
+// view keeps the scroll offset it had, which is still nearer to what was being read
+// than the top of the diff.
+//
+// An off-screen selection is still put back on the diff line it was on, wherever the
+// new rendering has that; it is only the view that stays where it is.
+func (self *DiffLineHelper) PreserveDiffPositionOnRerender(view *gocui.View) {
+	// A view that isn't the one its window is currently showing — the merge-conflicts
+	// view takes the main window over — isn't the one about to be re-rendered, so a
+	// restore installed on it would sit there and claim a later render instead.
+	if !view.Visible {
+		return
+	}
+
+	// The re-render is produced by a different command from the one behind what is on
+	// screen — another context size, another renderer — so without being told otherwise
+	// it would be taken for content the user has never seen and shown from the top.
+	// Whether or not a line of the old rendering can be found in the new one, the offset
+	// into it is nearer to where they were reading than the top is.
+	if manager := self.c.GetViewBufferManagerForView(view); manager != nil {
+		manager.SetKeepScrollPositionForNextTask()
+	}
+
+	showSelection := view.Highlight
+	selectionOnScreen := showSelection && view.IsLineVisible(view.SelectedLineIdx())
+	anchorViewLine := view.MiddleVisibleLineIdx()
+	if selectionOnScreen {
+		anchorViewLine = view.SelectedLineIdx()
+	}
+	// A selection that has been scrolled away from is put back by its own lines rather
+	// than by the anchor's, so that it comes out on the same line of the diff without
+	// the view having to go there.
+	var selectionCandidates []diffLineAnchor
+	if showSelection && !selectionOnScreen {
+		selectionCandidates = self.nearbyDiffLines(view, view.SelectedLineIdx())
+	}
+
+	self.restoreDiffLinePositionOnRerender(view, self.nearbyDiffLines(view, anchorViewLine),
+		func(anchor diffLineAnchor, viewLine int) {
+			// Put the line back on the screen row it was on, clamped into the view for
+			// the fallback lines, which can come from off screen.
+			row := lo.Clamp(anchor.row, 0, max(0, view.InnerHeight()-1))
+			view.SetOrigin(0, max(0, viewLine-row))
+			if showSelection {
+				// A range's other end is a view line, which the new rendering has made
+				// mean something else, so the selection collapses to the line we landed
+				// on. The origin is already where it should be, so moving the cursor
+				// there mustn't scroll.
+				view.CancelRangeSelect()
+				view.FocusPoint(0, self.selectionLine(view, selectionCandidates, viewLine), false)
+			}
+		})
+}
+
+// selectionLine returns the line to put the cursor on once a re-render is on screen:
+// the line the position anchor landed on, which is the selected one whenever it was
+// on screen, and otherwise the nearest surviving line to where the selection was —
+// found among its own candidates, since the anchor's are a search of the diff from
+// somewhere else entirely.
+func (self *DiffLineHelper) selectionLine(
+	view *gocui.View, candidates []diffLineAnchor, anchorViewLine int,
+) int {
+	if len(candidates) == 0 {
+		return anchorViewLine
+	}
+	_, bufferLine := self.nearestSurvivingCandidate(view.DiffLineContents(), candidates)
+	if bufferLine == -1 {
+		return anchorViewLine
+	}
+	if viewLine, ok := view.ViewLineForBufferLine(bufferLine); ok {
+		return viewLine
+	}
+	return anchorViewLine
+}
+
+// restoreDiffLinePositionOnRerender arranges for view's next re-render to land on the
+// first of the given candidate lines the new rendering still has, calling place with
+// that candidate and the view line it ended up on. The candidates are in priority
+// order (see nearbyDiffLines); if the rendering has none of them, place isn't called
+// and the view re-renders as it otherwise would.
+//
+// The nearest candidate is looked for as the content loads, so that the re-render can
+// be revealed at the right position as soon as that line and a screenful below it
+// have arrived. Only the nearest one, because the candidates aren't in load order: a
+// farther one can load first, and landing on it while a nearer one is still on its
+// way would be settling for worse. The rest are considered together once the whole
+// rendering is there.
+func (self *DiffLineHelper) restoreDiffLinePositionOnRerender(
+	view *gocui.View, candidates []diffLineAnchor, place func(anchor diffLineAnchor, viewLine int),
+) {
+	manager := self.c.GetViewBufferManagerForView(view)
+	if manager == nil || len(candidates) == 0 {
+		return
+	}
+
+	// The readiness check below runs on the task's own goroutine, where neither the
+	// view's dimensions nor the repo we are in may be read — a repo switch replaces
+	// the latter — so take both here, on the UI thread, for it to work from.
+	viewHeight := view.InnerHeight()
+	worktreePath := self.c.Git().RepoPaths.WorktreePath()
+
+	// What the search of the loading content has found, and how far it has looked, so
+	// that each line is looked at once.
+	found := diffLineAnchor{}
+	foundLine := -1
+	scanned := 0
+
+	manager.SetRestoreForNextTask(&tasks.RenderRestore{
+		FirstPaintReady: func() bool {
+			if foundLine == -1 {
+				rows := view.OffscreenDiffLineContentsFrom(scanned)
+				for i, row := range rows {
+					if rowShowsDiffLine(row, worktreePath, candidates[0].identity) {
+						found, foundLine = candidates[0], scanned+i
+						break
+					}
+				}
+				scanned += len(rows)
+				if foundLine == -1 {
+					return false
+				}
+			}
+			// Wait for a screenful below the line as well, so that the re-render isn't
+			// revealed with it stranded at the bottom of a half-filled view.
+			return view.OffscreenLineCount() >= foundLine+viewHeight
+		},
+		Apply: func(swapIn func()) bool {
+			anchor, bufferLine := found, foundLine
+			if bufferLine == -1 {
+				anchor, bufferLine = self.nearestSurvivingCandidate(view.OffscreenDiffLineContents(), candidates)
+			}
+
+			swapIn()
+
+			if bufferLine == -1 {
+				return false
+			}
+			viewLine, ok := view.ViewLineForBufferLine(bufferLine)
+			if !ok {
+				return false
+			}
+			place(anchor, viewLine)
+			return true
+		},
+	})
+}
+
+// nearbyDiffLines collects the lines of view's rendered diff as candidates for a
+// restore to land on, ordered by proximity to the anchor line — the anchor itself
+// first, then outward, preferring at-or-below on ties — each tagged with the screen
+// row it is on. A restore lands on the first of them its re-render still has, so this
+// order makes it land as near as possible to where the user was.
+//
+// The walk covers the whole diff rather than stopping at the change lines on either
+// side of the anchor, which a context-size change always keeps: ignoring whitespace
+// keeps nothing in particular, and can take a hunk or a whole file out of the diff,
+// leaving the nearest surviving line in a neighbouring file.
+func (self *DiffLineHelper) nearbyDiffLines(view *gocui.View, anchorViewLine int) []diffLineAnchor {
+	anchor, ok := view.BufferLineForViewLine(anchorViewLine)
+	if !ok {
+		return nil
+	}
+	resolved := self.resolveDiffLines(view.DiffLineContents())
+	if anchor >= len(resolved) {
+		return nil
+	}
+	rows := screenRows(view, len(resolved))
+
+	candidates := make([]diffLineAnchor, 0, len(resolved))
+	collect := func(bufferLine int) {
+		if line := resolved[bufferLine]; line.ok {
+			candidates = append(candidates, diffLineAnchor{identity: line.info, row: rows[bufferLine]})
+		}
+	}
+	collect(anchor)
+	for below, above := anchor+1, anchor-1; below < len(resolved) || above >= 0; below, above = below+1, above-1 {
+		if below < len(resolved) {
+			collect(below)
+		}
+		if above >= 0 {
+			collect(above)
+		}
+	}
+	return candidates
+}
+
+// screenRows maps each line of view's content to the screen row it is drawn on. The
+// lines above the visible ones get -1 and those below them the view's height, so that
+// putting one of them back where it was lands it at the top or bottom edge.
+func screenRows(view *gocui.View, bufferLineCount int) []int {
+	height := view.InnerHeight()
+	originY := view.OriginY()
+
+	rows := make([]int, bufferLineCount)
+	for i := range rows {
+		rows[i] = -1
+	}
+	lastVisible := -1
+	for y := originY; y < min(originY+height, view.ViewLinesHeight()); y++ {
+		bufferLine, ok := view.BufferLineForViewLine(y)
+		if !ok || bufferLine >= bufferLineCount {
+			continue
+		}
+		if rows[bufferLine] == -1 {
+			rows[bufferLine] = y - originY
+		}
+		lastVisible = bufferLine
+	}
+	for i := lastVisible + 1; i < bufferLineCount; i++ {
+		rows[i] = height
+	}
+	return rows
+}
+
+// nearestSurvivingCandidate returns the first of the candidates that the given
+// rendering still shows, and the line of it that does. The rendering is indexed
+// first, rather than searched once per candidate: the candidate list is as long as
+// the diff, and so is the rendering.
+func (self *DiffLineHelper) nearestSurvivingCandidate(
+	contents []gocui.DiffLineContent, candidates []diffLineAnchor,
+) (diffLineAnchor, int) {
+	lines := map[patchLine]int{}
+	for i, identities := range self.resolveDiffLineIdentities(contents) {
+		for _, identity := range identities {
+			if _, seen := lines[patchLineOf(identity)]; !seen {
+				lines[patchLineOf(identity)] = i
+			}
+		}
+	}
+
+	for _, candidate := range candidates {
+		if line, ok := lines[patchLineOf(candidate.identity)]; ok {
+			return candidate, line
+		}
+	}
+	return diffLineAnchor{}, -1
+}
+
+// rowShowsDiffLine reports whether the given row of a rendering shows the given diff
+// line — among any others it shows, since a side-by-side rendering puts a deletion
+// beside the addition replacing it. It only knows what the renderer states about the
+// row, since the alternative, parsing the rendering as a diff, needs whole hunks and
+// this is asked of content that is still loading. It takes the repo's worktree path
+// rather than reading it, being asked off the UI thread.
+func rowShowsDiffLine(row gocui.DiffLineContent, worktreePath string, target types.DiffLineInfo) bool {
+	return lo.SomeBy(row.Metadata, func(record string) bool {
+		parsed, ok := parseDiffLineMetadata(record)
+		return ok && patchLineOf(diffLineInfoIn(worktreePath, parsed)) == patchLineOf(target)
+	})
+}
+
+// patchLine records what stays the same about a diff line when the same diff is
+// rendered again differently: which file it belongs to, the line number that
+// identifies it on the side it belongs to, and what kind of line it is.
+type patchLine struct {
+	path string
+	// Every kind of content line collapses into DiffLineContext, since an addition
+	// and the context line it turns into when whitespace stops counting are the same
+	// line of the same file. The header rows keep their kind: a file's header and the
+	// first line of the file it heads are not the same place.
+	kind types.DiffLineType
+	// The old file's line number for a deletion, since two consecutive deletions
+	// share a new-file position and differ only here; the new file's otherwise.
+	line       int
+	isDeletion bool
+}
+
+func patchLineOf(info types.DiffLineInfo) patchLine {
+	switch info.Type {
+	case types.DiffLineFileHeader, types.DiffLineHunkHeader:
+		return patchLine{path: info.Path, kind: info.Type, line: info.NewLine}
+	case types.DiffLineDeleted:
+		return patchLine{path: info.Path, kind: types.DiffLineContext, line: info.OldLine, isDeletion: true}
+	default:
+		return patchLine{path: info.Path, kind: types.DiffLineContext, line: info.NewLine}
+	}
+}
diff --git a/pkg/integration/tests/main_view/keep_position_in_both_panes_when_changing_context_size.go b/pkg/integration/tests/main_view/keep_position_in_both_panes_when_changing_context_size.go
new file mode 100644
index 000000000..ec686ede7
--- /dev/null
+++ b/pkg/integration/tests/main_view/keep_position_in_both_panes_when_changing_context_size.go
@@ -0,0 +1,71 @@
+package main_view
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var KeepPositionInBothPanesWhenChangingContextSize = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Changing the diff's context size keeps the place in the lower pane too, not only in the upper one",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	Width:        120,
+	Height:       30,
+	SetupConfig: func(cfg *config.AppConfig) {
+		cfg.GetUserConfig().Gui.UseHunkModeInStagingView = false
+	},
+	SetupRepo: func(shell *Shell) {
+		lines := make([]string, 40)
+		for i := range lines {
+			lines[i] = fmt.Sprintf("line%02d", i+1)
+		}
+		shell.CreateFileAndAdd("file1", strings.Join(lines, "\n")+"\n")
+		shell.Commit("one")
+
+		// Four staged changes, far enough apart that they stay four hunks as the
+		// context size grows, and one unstaged one to split the file's diff across
+		// both panes.
+		for _, i := range []int{5, 15, 25, 35} {
+			lines[i-1] = strings.ToUpper(lines[i-1])
+		}
+		shell.UpdateFile("file1", strings.Join(lines, "\n")+"\n")
+		shell.GitAddAll()
+
+		lines[39] = strings.ToUpper(lines[39])
+		shell.UpdateFile("file1", strings.Join(lines, "\n")+"\n")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Files().
+			IsFocused().
+			Press(keys.Universal.FocusMainView)
+
+		// The lower pane holds the staged changes; getting to the last of them scrolls
+		// it, so there is a position to lose.
+		t.Views().Main().
+			IsFocused().
+			PressTab()
+
+		t.Views().Secondary().
+			IsFocused().
+			Press(keys.Main.NextHunk).
+			Press(keys.Main.NextHunk).
+			Press(keys.Main.NextHunk).
+			SelectedLines(
+				Contains("-line35"),
+			).
+			SelectedLineIdx(35).
+			OriginY(14).
+			Press(keys.Universal.IncreaseContextInDiffView).
+			Tap(func() {
+				t.ExpectToast(Equals("Changed diff context size to 4"))
+			}).
+			SelectedLines(
+				Contains("-line35"),
+			).
+			SelectedLineIdx(42).
+			OriginY(21)
+	},
+})
diff --git a/pkg/integration/tests/main_view/keep_position_when_changing_context_size.go b/pkg/integration/tests/main_view/keep_position_when_changing_context_size.go
new file mode 100644
index 000000000..ba99eb072
--- /dev/null
+++ b/pkg/integration/tests/main_view/keep_position_when_changing_context_size.go
@@ -0,0 +1,97 @@
+package main_view
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var KeepPositionWhenChangingContextSize = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Changing the diff's context size keeps the line you were looking at where it was",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	Width:        120,
+	Height:       30,
+	SetupConfig: func(cfg *config.AppConfig) {
+		cfg.GetUserConfig().Gui.UseHunkModeInStagingView = false
+	},
+	SetupRepo: func(shell *Shell) {
+		lines := make([]string, 40)
+		for i := range lines {
+			lines[i] = fmt.Sprintf("line%02d", i+1)
+		}
+		shell.CreateFileAndAdd("file1", strings.Join(lines, "\n")+"\n")
+		shell.Commit("one")
+
+		// Four changes, far enough apart that they stay four hunks as the context
+		// size grows.
+		for _, i := range []int{5, 15, 25, 35} {
+			lines[i-1] = strings.ToUpper(lines[i-1])
+		}
+		shell.UpdateFile("file1", strings.Join(lines, "\n")+"\n")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Files().
+			IsFocused().
+			Press(keys.Universal.FocusMainView)
+
+		t.Views().Main().
+			IsFocused().
+			Press(keys.Main.NextHunk).
+			Press(keys.Main.NextHunk).
+			Press(keys.Main.NextHunk).
+			SelectedLines(
+				Contains("-line35"),
+			).
+			// The diff is longer than the view, so getting to the last hunk scrolled
+			// it: the selected line sits 21 rows down the screen.
+			SelectedLineIdx(35).
+			OriginY(14).
+			Press(keys.Universal.IncreaseContextInDiffView).
+			Tap(func() {
+				t.ExpectToast(Equals("Changed diff context size to 4"))
+			}).
+			// A context line more on either side of each of the four hunks pushes the
+			// selected line seven lines further into the diff. The view follows it, so
+			// it is still the same line on the same screen row (42 - 21 = 21).
+			SelectedLines(
+				Contains("-line35"),
+			).
+			SelectedLineIdx(42).
+			OriginY(21).
+			Press(keys.Universal.DecreaseContextInDiffView).
+			Tap(func() {
+				t.ExpectToast(Equals("Changed diff context size to 3"))
+			}).
+			Press(keys.Universal.DecreaseContextInDiffView).
+			Tap(func() {
+				t.ExpectToast(Equals("Changed diff context size to 2"))
+			}).
+			// And the same the other way (28 - 21 = 7).
+			SelectedLines(
+				Contains("-line35"),
+			).
+			SelectedLineIdx(28).
+			OriginY(7).
+			// Leaving the view gives up the selection but not the scroll position, and
+			// with no selection to keep, it is the middle visible line that stays put.
+			PressEscape()
+
+		t.Views().Files().
+			IsFocused().
+			Press(keys.Universal.IncreaseContextInDiffView).
+			Tap(func() {
+				t.ExpectToast(Equals("Changed diff context size to 3"))
+			})
+
+		// The middle visible line here is a hunk's header, and a context-size change
+		// rewrites those — they name the lines the hunk covers. So the restore falls
+		// back to the nearest line that does survive, the context line just below it,
+		// and puts that back on the row it was on.
+		t.Views().Main().
+			SelectionIsHidden().
+			OriginY(12)
+	},
+})
diff --git a/pkg/integration/tests/main_view/keep_position_when_the_selection_is_off_screen.go b/pkg/integration/tests/main_view/keep_position_when_the_selection_is_off_screen.go
new file mode 100644
index 000000000..d195cb7bb
--- /dev/null
+++ b/pkg/integration/tests/main_view/keep_position_when_the_selection_is_off_screen.go
@@ -0,0 +1,65 @@
+package main_view
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var KeepPositionWhenTheSelectionIsOffScreen = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "A re-render keeps the lines that are on screen where they are, not a selection scrolled away from",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	Width:        120,
+	Height:       30,
+	SetupConfig: func(cfg *config.AppConfig) {
+		cfg.GetUserConfig().Gui.UseHunkModeInStagingView = false
+		// Half a diff per scroll, to leave the selection well behind in two presses.
+		cfg.GetUserConfig().Gui.ScrollHeight = 15
+	},
+	SetupRepo: func(shell *Shell) {
+		lines := make([]string, 60)
+		for i := range lines {
+			lines[i] = fmt.Sprintf("line%02d", i+1)
+		}
+		shell.CreateFileAndAdd("file1", strings.Join(lines, "\n")+"\n")
+		shell.Commit("one")
+
+		for _, i := range []int{5, 15, 25, 35, 45, 55} {
+			lines[i-1] = strings.ToUpper(lines[i-1])
+		}
+		shell.UpdateFile("file1", strings.Join(lines, "\n")+"\n")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Files().
+			IsFocused().
+			Press(keys.Universal.FocusMainView)
+
+		t.Views().Main().
+			IsFocused().
+			SelectedLines(
+				Contains("-line05"),
+			).
+			// Reading on past the selection leaves it far behind, off the top of the
+			// view.
+			Press(keys.Universal.ScrollDownMain).
+			Press(keys.Universal.ScrollDownMain).
+			OriginY(30).
+			Press(keys.Universal.DecreaseContextInDiffView).
+			Tap(func() {
+				t.ExpectToast(Equals("Changed diff context size to 2"))
+			}).
+			// A context line less on either side of the four hunks above what is on
+			// screen pulls it nine lines up the diff, and the view follows it there: the
+			// lines the user was reading are still on the rows they were on.
+			OriginY(21).
+			// The selection is where it always was, on its own line of the diff, rather
+			// than having been dragged back into view.
+			SelectedLines(
+				Contains("-line05"),
+			).
+			SelectedLineIdx(7)
+	},
+})
diff --git a/pkg/integration/tests/main_view/keep_scroll_when_the_diff_cant_be_read.go b/pkg/integration/tests/main_view/keep_scroll_when_the_diff_cant_be_read.go
new file mode 100644
index 000000000..9cda012c9
--- /dev/null
+++ b/pkg/integration/tests/main_view/keep_scroll_when_the_diff_cant_be_read.go
@@ -0,0 +1,58 @@
+package main_view
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var KeepScrollWhenTheDiffCantBeRead = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Changing the context size under a diff renderer whose rows can't be placed keeps the scroll position rather than jumping to the top",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	Width:        120,
+	Height:       30,
+	SetupConfig: func(cfg *config.AppConfig) {
+		cfg.GetUserConfig().Gui.UseHunkModeInStagingView = false
+		// A renderer that says nothing about which line of which file each row shows,
+		// and mangles the diff enough that it can't be read back as one either: no line
+		// of it can be looked for in the re-render.
+		cfg.GetUserConfig().Git.DiffRenderers = []config.DiffRendererConfig{
+			{Name: "opaque", Command: `sed -e 's/^/| /'`},
+		}
+	},
+	SetupRepo: func(shell *Shell) {
+		lines := make([]string, 40)
+		for i := range lines {
+			lines[i] = fmt.Sprintf("line%02d", i+1)
+		}
+		shell.CreateFileAndAdd("file1", strings.Join(lines, "\n")+"\n")
+		shell.Commit("one")
+
+		for _, i := range []int{5, 15, 25, 35} {
+			lines[i-1] = strings.ToUpper(lines[i-1])
+		}
+		shell.UpdateFile("file1", strings.Join(lines, "\n")+"\n")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Files().
+			IsFocused().
+			Press(keys.Universal.ScrollDownMain).
+			Press(keys.Universal.ScrollDownMain).
+			Press(keys.Universal.ScrollDownMain)
+
+		t.Views().Main().
+			Content(Contains("| +LINE05")).
+			OriginY(6).
+			Tap(func() {
+				t.Views().Files().Press(keys.Universal.IncreaseContextInDiffView)
+				t.ExpectToast(Equals("Changed diff context size to 4"))
+			}).
+			// The re-render is a different command, and nothing in its output can be
+			// matched up with what was on screen, so the offset is all there is to keep —
+			// and it is a good deal closer than the top.
+			OriginY(6)
+	},
+})
diff --git a/pkg/integration/tests/test_list.go b/pkg/integration/tests/test_list.go
index e4df6b23f..ab8978354 100644
--- a/pkg/integration/tests/test_list.go
+++ b/pkg/integration/tests/test_list.go
@@ -371,6 +371,10 @@ var tests = []*components.IntegrationTest{
 	main_view.EscapeDismissesSelection,
 	main_view.FileNavigationScrollsToTheTop,
 	main_view.HideSelectionWhenChangesVanish,
+	main_view.KeepPositionInBothPanesWhenChangingContextSize,
+	main_view.KeepPositionWhenChangingContextSize,
+	main_view.KeepPositionWhenTheSelectionIsOffScreen,
+	main_view.KeepScrollWhenTheDiffCantBeRead,
 	main_view.KeepSelectionVisibleWhenDiffShrinks,
 	main_view.NavigateByHunkAndFile,
 	main_view.NoSelectionOverABinaryDiff,