UV Pins
This command will define the currently selected points as UV Pins. If UV Pins already exist, the new ones will be added.
Use this command if you want to fix a point selection in UV space. This fixation can be applied where the UV mesh is relaxed (e.g., in conjunction with the Pin Point Selection option in the UV Manager's Relax UV menu or the UV Unwrap command.
Note that, depending on the tool used together with the UV Pins, only parts of the algorithm will be fixed or the Pins can move (e.g., in conjunction with UV Weld and Relax).
If you want to delete specific Pins, select the respective points and call up the Use UV Pins command. This selection will then be removed from the UV Pin selection.
This command deletes all Pins.