What does the menu Window | Arrange icons do in the Menu bar?
When multiple models are opened, minimized and then scattered around the Diagram pane, Arrange Icons will arrange all the scattered models to the bottom of the diagram pane.
Step 1: Open multiple models
In my example I have opened 3 models
Step 2: Minimize the models.
Step 3: drag them anywhere in ERwin /scatter
Step 4: Now once you click arrange icons these will be placed at the bottom of the diagram window