Create a new layer at the bottom of the list. If any shells are picked, they will be moved into the new layer.
U
Move the active layer up the list.
D
Move the active layer down the list.
X
Delete the active layer. Any shells in that layer will be moved into the top layer.
Move
Move all picked shells into active layer.
Each layer has four widgets:
Active
Click the gray button to make this the active layer. Shells not in the active layer are tinted gray and behave as if they are locked.
Name
Set the name of the layer.
Pick
Click the gray button to pick all shells in that layer. Click again to unpick the shells. This button also displays the number of shells in that layer.
Hide
Untick the toggle box to hide all shells in that layer.
