Collection Toggle restores the ability to show and hide collections using numerical keyboard shortcuts while hovering over the 3D viewport, a behavior changed in Blender 4.0. The add-on allows users to isolate specific collections, toggle visibility, and show all collections using standard number key bindings combined with modifier keys.

The tool extends standard functionality by adding shortcuts for render visibility toggles. Users can isolate collections for rendering, enable or disable specific collections for the final output, or set all collections to render. Additionally, the add-on maps numerical keys to collection selection, automatically making the targeted collection active for newly added objects. These core functions can be individually enabled or disabled from a dedicated sidebar panel.