Activate Controls changes to the subobject selection mode in the Select section of the Sculpt panel, activating this way the sculpt functionality. Depending on the selected Controls options, geometry objects are displayed with the corresponding controls types.
In subobject selection mode , the objects are displayed with the selected controls types and you can sculpt them. You can apply Controls options globally to all objects or only to a part of the objects. The Controls options can have four statuses:
Cleared
No Controls option is selected and no controls type displayed on objects.
Cleared in mixed status
One or multiple Controls options are active and assigned to some objects that are displayed with the assigned controls type.
Selected
Only objects with one assigned controls type are selected.
Selected in mixed status
Multiple objects with different controls types assigned are selected.
If no Controls option is assigned to objects, clicking Activate Controls applies the selected Controls options to all objects.
If one or multiple Controls options are assigned to a part of the objects, clicking Activate Controls activates and deactivates all assigned Controls options without changing their status. This way, you can show or hide globally the assigned controls types.