Format
set category = "Category"
Args
Category: A text string for the category.
Verbs in the same category are visually grouped together in the verb panels. The default is "", which is displayed in the default panel titled “Commands”. You can change that default by setting client/default_verb_category.
To hide a verb from all panels, set the category to null. The verb may still show up in right-click popup menus, so you may want to use the hidden or popup_menu verb properties instead.