2012

System Variables
IMAGEFRAME
Controls whether image frames are displayed and plotted.
Change Raster Image Brightness, Contrast, and Fade
You can change several display properties of raster images in a drawing for
easier viewing or special effects.
You can adjust brightness, contrast, and fade for the display of an image as
well as for plotted output without affecting the original raster image file and
without affecting other instances of the image in the drawing. Adjust brightness
to darken or lighten an image. Adjust contrast to make poor-quality images
easier to read. Adjust fade to make drawing geometry easier to see over images
and to create a watermark effect in your plotted output.
Bitonal images cannot be adjusted for brightness, contrast, or fade. Images
fade to the current screen background when displayed, and they fade to white
when plotted.
To adjust brightness, contrast, and fade of an image
1 Click Modify menu ➤ Object ➤ Image ➤ Adjust.
2 Select the image to modify.
3 In the Image Adjust dialog box, to adjust brightness, contrast, and fade,
use the appropriate slider or enter a value.
The default value for both brightness and contrast is 50. You can adjust
to a maximum brightness of 100 or to a minimum of 0. The default fade
value is 0. You can adjust to a maximum fade of 100.
4 Click OK.
Quick Reference
Commands
IMAGEADJUST
Controls the image display of the brightness, contrast, and fade values of
images.
Modify Raster Images and Image Boundaries | 1927