Next file button missing on the toolbar

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

The next button suddenly disappeared. I have 4 modified files so the should be next file button on the toolbar.

Steps to Reproduce

Probably it happened after I accidentally pressed some hot key, but I am not sure.

Operating System

MacOS

Version Information

Version: 2.4.28
VSCode Version: 1.105.1
Commit: f3f5cec40024283013878b50c4f9be4002e0b580
Date: 2026-02-03T00:56:18.293Z
Build Type: Stable
Release Track: Default
Electron: 39.2.7
Chromium: 142.0.7444.235
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Darwin arm64 25.2.0

For AI issues: which model did you use?

I think not related, but I use auto.

Additional Information

PS
What is the name of this toolbar? And how to configure its location?

Does this stop you from using Cursor

No - Cursor works, but with this issue

Weird. It turned out that I had accidentally pressed Cmd+E and switched to the agent layout (don’t know what that is). The button returned when I pressed Cmd+E again.

My issue is solved, but to me this looks like a serious UX bug.