2013

Fade Controls the fade effect of the underlay. Values range from 0 through
100, default value is 0. The greater the value, the lighter the linework in the
underlay appears. Works indirectly with the contrast effect; a higher contrast
value blends the underlay in the background when fade is set to a higher
value.
Contrast Controls the contrast, and indirectly the fading effect, of the
underlay. Values range from 0 through 100, default value is 100. The greater
the value, the more each pixel is forced to its primary or secondary color.
Monochrome Controls the color saturation of all linework while maintaining
the luminance. When turned on, the linework appears in varying shades of
gray starting at black if the background color luminance is 50 percent or more.
If the background color luminance is less than 50 percent, then the colors are
inverted, with the darkest linework displaying in white, and the lightest
linework displaying in black.
See also:
Adjust PDF Underlay Contrast, Fade, Monochrome, and Colors for the
Background
PDFATTACH
Attach a PDF file as an underlay into the current drawing.
Access Methods
Menu: Insert  PDF Underlay
Toolbar: Reference Manager palette  Attach Reference
Summary
When you attach a PDF file as an underlay, you link that referenced file to
the current drawing. Any changes to the referenced file are displayed in the
current drawing when it is opened or reloaded.
The Select Reference File dialog box (a
standard file selection dialog box (page
723)) is displayed. After the PDF file is attached, you can adjust and clip the
underlay from the PDF Underlay visor (page 775).
See also:
Attach PDF Files as Underlays
772 | Chapter 2 Commands