> For the complete documentation index, see [llms.txt](/llms.txt).
> Markdown versions of each page are available by appending .md to any URL.

# Syntax & Error Highlighting

Color-code commands and underline errors in real time as you type in Warp's input editor.

## What is syntax highlighting

Warp supports Syntax Highlighting in the [Input Editor.](/terminal/editor/) It colors each part of a command to help differentiate between sub-commands, options/flags, arguments, and variables.

Caution

Newly installed apps or newly created aliases will not trigger syntax highlighting until you open a new Warp session (new window, tab, or pane), even if you `source` the RC files in the current session.

### How to access syntax highlighting

When Syntax Highlighting is enabled, Warp’s [Input Editor](/terminal/editor/) automatically recognizes each part of the command as you type it into the Input Editor, and syntactically highlight them.

### How to enable/disable syntax highlighting

Syntax highlighting is enabled by default, to toggle it:

-   Through the [Command Palette](/terminal/command-palette/), search for the “Syntax Highlighting” option and click it (or press enter) to enable/disable.
-   Through **Settings** > **Features** > **Terminal Input** , toggle “Syntax highlighting for commands”

### How syntax highlighting works

## What is error underlining

Warp highlights errors in commands that are typed within the [Input Editor](/terminal/editor/) e.g. if the binary for the command you’ve typed does not exist.

Caution

Newly installed apps or newly created aliases will trigger error underlining until you open a new Warp session (new window, tab, or pane), even if you `source` the RC files in the current session.

### How to access error underlining

When Error Underlining is enabled, Warp automatically underlines any invalid commands with a dashed red underline.

### How to enable/disable error underlining

Error underlining is enabled by default, to toggle it:

-   Through the [Command Palette](/terminal/command-palette/), search for the “Syntax Highlighting” option and click it (or press enter) to enable/disable.
-   Through **Settings** > **Features** > **Terminal Input** , toggle “Error underlining for commands”

### How error underlining works