By default, the gedit text editor application uses the default font settings
that are specified in the Font preference tool
to display the text in the gedit window components
such as the menubar, toolbar, and application dialogs. However, you can customize
the font that gedit uses to display the text editor
window contents. To customize the font settings for the gedit window contents, perform the following steps:
In the gedit application, choose Edit -> Preferences.
In the Preferences dialog, select the Fonts & Colors category.
Perform one of the following steps:
To use the default application font that is specified in the Font preference tool, select the Use default theme
font option.
To specify a font, deselect the Use default theme font option, then click on the Font used by the editor button to display the font selector dialog.