CLAUDE_CODE_SCROLL_SPEEDI30

Updated October 14, 2026 by Alex Sorokoletov

CLAUDE_CODE_SCROLL_SPEEDI30 is a Claude Code environment variable. Removed between v2.1.229 and v2.1.234, so current releases ignore it. It is not in the official reference.

Status	Removed between v2.1.229 and v2.1.234
Added	Added in v2.1.229
Category	Terminal and UI
Official docs	Not listed

How to set it

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

export CLAUDE_CODE_SCROLL_SPEEDI30=<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_SPEEDI30": "<value>"
  }
}

Related variables

CLAUDE_CODE_DISABLE_VIRTUAL_SCROLL: Disable virtual scrolling in terminal UI.
CLAUDE_CODE_SCROLL_SPEED: Controls the scroll speed within the terminal UI.
CLAUDE_CODE_SCROLL_SPEEDI
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

Which Claude Code version has CLAUDE_CODE_SCROLL_SPEEDI30?

Removed between v2.1.229 and v2.1.234, so current releases ignore it.

How do I set CLAUDE_CODE_SCROLL_SPEEDI30?

Export it before starting Claude Code (export CLAUDE_CODE_SCROLL_SPEEDI30=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.