This feature allows us to group several shapes.
You may use the
Group Shapes button or shortcuts:
G— start selection / end selection in group mode
Esc— close group mode
Shift+G— reset group for selected shapes
You may select shapes clicking on them or selecting an area.
Grouped shapes will have
group_id filed in dumped annotation.
Also you may switch color distribution from an instance (default) to a group.
You have to switch
Color By Group checkbox for that.
Shapes that don’t have
group_id, will be highlighted in white.