Move top level parts
In Work, drag a top level part or group to another row and column, or set its row and column numbers. The others shift to make room.
Save an arrangement
Choose Arrangements and save the places of the model's top level parts under a name. The file's own layout is kept as Original model.
Try another and compare
Save another arrangement, then open or compare them. Up to five are kept.
Step back if you need to
Undo steps back through your changes, and Reset places returns the parts to where they were.