Change DGN underlay display, clip, layer, and osnap options.
When you select a DGN underlay in a drawing, the DGN Underlay Contextual tab is displayed on the ribbon.
The following options are displayed.
Controls the contrast and the fading effect of the underlay. The greater the value, the more each pixel is forced to its primary secondary color.
Controls the appearance of the linework. The greater the value, the lighter the linework in the underlay appears.
Displays the underlay in black and white.
Deletes the clipping boundary.
Hides or displays the underlay.
Determines whether object snapping is active for geometry in the DGN underlay.