To Show or Hide the Clipped Portion of an Underlay
Select the clipped underlay you want to show or hide.
Right-click in the drawing area and click Clip PDF.
From the prompt, select On to turn on clipping and displays the PDF underlay clipped to the previously defined boundary.
From the prompt, select Off to turn off clipping and displays the entire PDF underlay and frame.
Note: If you re-clip the PDF underlay while clipping is turned off, clipping is automatically turned back on. You are prompted to delete the old boundary even when clipping is turned off and the clipping boundary is not visible.