After placing a wall sweep, you can return its ends back toward the wall.
The Straight Cut and Return options display on the Options Bar. The Straight Cut is a perfectly squared off edge. This option is not available if the sweep end is already in this state.
Highlighted wall sweep end
Applied return value
In this example, the option Straight Cut becomes available. Select that option, and click the sweep end to apply a straight cut to the sweep.
After you change the return, you can drag the end of the sweep or reveal to extend the return. Select the wall sweep, and use the blue dot drag control.
Drag the right blue control