The Groups Together mode packs UV islands split by the user into a number of groups. All islands are packed into a single box in the UV space, so that islands belonging to the same group are neighbors in the resulting layout.
In order to use the Groups Together packing mode select it from the Main Mode selection menu:
The Groups Together mode is a group-based mode, that is why the Island Grouping panel will appear in the addon UI after the mode is selected:
In the Island Grouping panel you specify a method to divide all islands to a specific number of groups (an automatic or manual method). During the packing operation, the packer will pack all groups together into a single UV target box, so that islands belonging to the same group are neighbors.
Supported packing functionalities
The mode supports the following packing functionalities: