CLAUDE_CODE_SCROLL_SPEED

Updated October 13, 2026 by Alex Sorokoletov

CLAUDE_CODE_SCROLL_SPEED is a Claude Code environment variable: Controls the scroll speed within the terminal UI. Default scroll behavior in terminal applications is typically one line per scroll event, which can feel sluggish when reviewing long tool outputs or code diffs. Added between v2.1.87 and v2.1.88 and still present in v2.1.294. It is listed in the official reference.

Status	Present in v2.1.294
Added	Added between v2.1.87 and v2.1.88
Category	Terminal and UI
Official docs	Listed

How to set it

For one session, export it in the shell that starts Claude Code:

export CLAUDE_CODE_SCROLL_SPEED=<value>
claude

To apply it to every session, add it to the env object of a settings file:

// ~/.claude/settings.json
{
  "env": {
    "CLAUDE_CODE_SCROLL_SPEED": "<value>"
  }
}

Release notes that mention it

Related variables

CLAUDE_CODE_DISABLE_VIRTUAL_SCROLL: Disable virtual scrolling in terminal UI.
CLAUDE_CODE_SCROLL_SPEEDI
CLAUDE_CODE_SCROLL_SPEEDI30
CLAUDE_AX_PREPARK_MS
CLAUDE_AX_SCREEN_READER
CLAUDE_AX_STARTUP_QUIET_MS: Startup quiet window (milliseconds) for screen-reader mode.
CLAUDE_CODE_ACCESSIBILITY: Enable accessibility mode; disables cursor hiding.
CLAUDE_CODE_ALT_SCREEN_FULL_REPAINT

Frequently asked questions

What does CLAUDE_CODE_SCROLL_SPEED do?

Controls the scroll speed within the terminal UI. Default scroll behavior in terminal applications is typically one line per scroll event, which can feel sluggish when reviewing long tool outputs or code diffs.

Which Claude Code version has CLAUDE_CODE_SCROLL_SPEED?

Added between v2.1.87 and v2.1.88 and still present in v2.1.294.

How do I set CLAUDE_CODE_SCROLL_SPEED?

Export it before starting Claude Code (export CLAUDE_CODE_SCROLL_SPEED=value), or add it to the "env" object in ~/.claude/settings.json to apply it to every session.

All variables, searchable: Claude Code environment variables.