N Panel Sub Tabs is an addon that helps manage an overcrowded sidebar by introducing a categorized sub-tab system. Users can group similar addon tabs into custom categories, such as rigging or material tools, making them easier to locate. The grouped sub-tabs are displayed in a dedicated title panel for quick switching between tools.

The addon includes a settings interface where users can add, remove, rename, and reorder both categories and tabs. Additional preferences allow users to control the maximum number of tabs displayed per row and toggle whether category settings are applied automatically when Blender starts. Category configurations can also be exported and imported to back up or transfer workspace layouts.