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tty7/docs/git/diffs.mdx
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l0ng-ai fed4aec170 docs: replace placeholder screenshots and add a one-minute tour video
Every placeholder frame in docs/ now shows a real capture of the current
build: 20 screenshots plus two short looping clips (prompt editor, pane
drag). The README and the docs home page link a one-minute tour covering
agent status across repos, one agent driving another through the CLI,
the prompt editor, diffs, pane dragging, and sessions surviving a quit.
2026-09-24 08:18:14 +08:00

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---
title: "Diffs"
description: "The diff overlay: side-by-side or unified, from the sidebar or the panel."
---
## Opening one
| From | How |
|---|---|
| The sidebar | Click a row's `+N −M` counts |
| Source Control | **Open Changes** on a file, or click the row |
| History | Click a file inside a commit's detail view |
A diff docks beside the terminal, in the same column an open file uses, so the
pane you were reading stays on screen. <kbd>Esc</kbd> closes it, and its header
right-clicks to a menu that fills the window with it if you prefer that —
[more about the column →](/window/side-panel#where-it-opens)
<Frame caption="The diff, side by side, across every changed file">
<img src="/images/diff-overlay.webp" alt="The tty7 diff overlay" />
</Frame>
## Side-by-side or unified
**Toggle Unified / Side-by-Side Diff** in the command palette switches between
the two. The choice is global — one setting for every diff, the same call VS
Code's `diffEditor.renderSideBySide` makes — and persists as `diff_view` in
`config.json`.
## What it shows
- Every changed file, with its status and `+N −M`
- **Untracked files** as a preview of their contents, up to 4 MB — past that the
card says the read failed rather than showing a silently cut-off file
- A commit's files, when the diff came from the history
Two limits keep a huge diff from becoming a huge wait:
| Limit | Value | What happens |
|---|---|---|
| Files rendered | 300 | *"… and N more changed files — run git diff in the terminal to see them."* |
| Lines before auto-collapse | 400 per file | Big files start collapsed; expand the ones you care about |
Both are stated in the overlay when they apply — nothing is dropped silently.
## Turning the sidebar shortcut off
If you would rather the sidebar's counts not be clickable, turn off **Settings →
Window & Tabs → Open diff preview from sidebar counts**
(`sidebar_diff_preview: false`). The branch and counts stay on the row; they
just stop opening the overlay.