Emacs/emacs/Lucid-Resources

From Get docs

D.3 Lucid Menu And Dialog X Resources

If Emacs is compiled with the X toolkit support using Lucid widgets, you can use X resources to customize the appearance of the menu bar (see Menu Bar), pop-up menus, and dialog boxes (see Dialog Boxes). The resources for the menu bar fall in the ‘pane.menubar’ class (following, as always, either the name of the Emacs executable or ‘Emacs’ for all Emacs invocations). The resources for the pop-up menu are in the ‘menu*’ class. The resources for dialog boxes are in the ‘dialog*’ class.

For example, to display menu bar entries with the ‘Courier-12’ font (see Fonts), write this:

Emacs.pane.menubar.font: Courier-12

Lucid widgets can display multilingual text in your locale. To enable this, specify a fontSet resource instead of a font resource. See Fontsets. If both font and fontSet resources are specified, the fontSet resource is used.

Here is a list of resources for menu bars, pop-up menus, and dialogs:

font
Font for menu item text.
fontSet
Fontset for menu item text.
background
Background color.
buttonForeground
Foreground color for a selected item.
foreground
Foreground color.
horizontalSpacing
Horizontal spacing in pixels between items. Default is 3.
verticalSpacing
Vertical spacing in pixels between items. Default is 2.
arrowSpacing
Horizontal spacing between the arrow (which indicates a submenu) and the associated text. Default is 10.
shadowThickness
Thickness of shadow lines for 3D buttons, arrows, and other graphical elements. Default is 1.
margin
Margin of the menu bar, in characters. Default is 1.