---
title: Diff
description: The diff overlay: what the agent changed, by scope, file and hunk.
url: https://docs-v3-preview.elastic.dev/diff
---

# Diff
`gd` opens the diff overlay for the session's worktree: what changed, file by file, hunk by hunk, with word-level
highlights.
![The diff overlay: files on the left, the hunks of the current file on the right](https://docs-v3-preview.elastic.dev/images/shots/diff/overlay.png)

| Key         |                                                            |
|-------------|------------------------------------------------------------|
| `⇥` / `⇧⇥`  | Scope: **all**, **committed**, **staged**, **unstaged**    |
| `c`         | One commit at a time (cycles through the branch's commits) |
| `]f` / `[f` | Next / previous file                                       |
| `n` / `N`   | Next / previous hunk                                       |
| `j` / `k`   | Move by line                                               |
| `gd` or `⎋` | Close                                                      |

See [Reviewing changes](https://docs-v3-preview.elastic.dev/diff/reviewing) for the split view and acting on a hunk.