[Home](./index.md) > [bitburner](./bitburner.md) > [UserInterface](./bitburner.userinterface.md) > [setTailFontSize](./bitburner.userinterface.settailfontsize.md) ## UserInterface.setTailFontSize() method Set the font size of the tail window of a script. **Signature:** ```typescript setTailFontSize(pixel?: number, fn?: FilenameOrPID, host?: string, ...args: ScriptArg[]): void; ``` ## Parameters

Parameter	Type	Description
pixel	number	_(Optional)_ Optional. The new font size in pixels. If omitted, the default tail font size is used.
fn	[FilenameOrPID](./bitburner.filenameorpid.md)	_(Optional)_ Optional. Filename or PID of the target script. If omitted, the current script is used.
host	string	_(Optional)_ Optional. Hostname/IP of the target script. Defaults to the server this script is running on. If args are specified, this is not optional.
args	[ScriptArg](./bitburner.scriptarg.md)\[\]	Arguments for the target script.

**Returns:** void ## Remarks RAM cost: 0 GB This overwrites the tail font size and forces an update of the tail window's contents. If ran without a filename or pid, this will affect the current script's tail window. Otherwise, the PID or filename, hostname/ip, and args… arguments can be used to target the tail window from another script. Remember that scripts are uniquely identified by both their names and arguments.