flatten
Consolidate structure into a layer.
flatten <targetlayer>
This command only works with a selection.
Layermask layers act as source layers. The links between selected doodles are removed from their source layer and recreated on the target layer. If a doodle is orphaned on a layer, it is removed from that layer. The target layer may be chosen from among the layermask layers. If the specified target layer does not exist, it is created.
move
mv