Displays options for editing PDF underlays.
The following options are displayed.
When you select a PDF underlay, the PDF Contextual tab is displayed on the ribbon.
Controls the contrast and the fading effect of the underlay.
Controls the appearance of the linework. The greater the value, the lighter the linework in the underlay is displayed.
Displays the underlay in black and white.
Deletes the old clipping boundary (if one exists) and create a new one.
Deletes the clipping boundary.
Hides or displays the underlay.
Determines whether object snapping is active for geometry in the underlay.