2011

Table Of Contents
Quick Reference
System Variables
DGNOSNAP
Determines whether object snapping is active for geometry in DGN underlays
that are attached to the drawing.
DWFOSNAP
Determines whether object snapping is active for geometry in DWF or DWFx
underlays that are attached to the drawing.
PDFOSNAP
Determines whether object snapping is active for geometry in PDF underlays
that are attached to the drawing.
UOSNAP
Determines whether object snapping is active for geometry in DWF, DWFx,
PDF, and DGN underlays that are attached to the drawing.
Adjust Underlay Contrast, Fade, Monochrome, and Colors for
the Background
You can modify the contrast, fade, and monochrome settings of an underlay.
Also, so that the underlay is visible, you can adjust the underlay colors based
on the AutoCAD background colors.
Adjusting these settings does not alter the original file and does not affect
other instances of the underlay in the drawing. You can change the contrast,
fade, monochrome, and colors in the Properties palette when an underlay is
selected. You can also use the DWFADJUST, PDFADJUST, DGNADJUST, or
ADJUST commands.
If you change contrast, fade, and monochrome values, plotted output is
affected.
Adjust Colors for Background
Adjust Colors for Background controls whether the underlay colors are visible
against the drawing background color. The default setting of Yes indicates
that the background colors of the underlay and the drawing environment are
analyzed to see if they are both light or both dark, or is one dark and the other
light. When one background is light and the other dark, the colors of the
1766 | Chapter 37 Work with Data in Other Formats