Feature: Support keyboard scrolling to review full session history in TUI

[hackee9]

Describe the feature or problem you'd like to solve

Currently, when the AI model produces a long response in the Copilot CLI TUI, users can only see the last screen of output. There is no way to scroll up using keyboard shortcuts (e.g., Page Up / Arrow Up) within the TUI itself to review earlier parts of the response or previous turns in the conversation.

This is especially painful when:

• The model produces long code blocks or analysis that spans multiple screens
• You want to review earlier steps in a multi-turn session without re-running the prompt
• Long tool output (e.g., test results, file diffs) is truncated by the viewport

Proposed solution

Add native keyboard-based scrolling support in the TUI viewport, for example:

• Page Up / Page Down — scroll one screen at a time through session history
• Ctrl+↑ / Ctrl+↓ — scroll line by line
• Or a dedicated scroll mode (similar to tmux copy mode) activated by a shortcut like Ctrl+B [

Alternatively, expose a /scroll or /pager command that opens the full session output in an interactive pager (e.g., less).

Workarounds currently available (but insufficient)

• /copy — copies only the last response to clipboard
• /share — exports the full session to Markdown/Gist, but requires leaving the TUI
• Terminal-native scroll — often intercepted by the TUI and either disabled or broken (see related issue 🐛 Scrolling up one page causes scrollbar to jump to top of terminal session #1587)

Related issues

• 🐛 Scrolling up one page causes scrollbar to jump to top of terminal session #1587 — Scrolling up one page causes scrollbar to jump to top of terminal session

Additional context

This is a common pain point for users working on tasks that produce verbose output (e.g., code review, log analysis, test runs). Native scrolling support would significantly improve the day-to-day usability of the TUI.

• OS: Linux
• Terminal: standard terminal emulator

[devm33]

Hi @hackee9,

Page up and page down should be supported. Could clarify which terminal emulator you are using and if you are using any multiplexer (e.g. tmux or screen).

Also unless "mouse": false is set in your ~/.copilot/config.json then mouse scrolling should work as well.

[examon]

This should be resolved as of v1.0.20. Page Up/Page Down and Home/End are supported for scrolling through session history in the TUI, and mouse wheel scrolling works as well. If those keys still aren't responding in your terminal, it may be environment-specific as the maintainer suggested. Feel free to reopen if you're still experiencing the problem.