Autotek autocad raster design 2010 用户手册

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To clip an image
Enter IMAGECLIP.
Select the image you want to clip. You can only clip one image at a time.
The following prompt is displayed:
Enter image clipping option [ON/OFF/Delete/New boundary] <New>:
Press Enter to create a new clip boundary.
Enter r to create a rectangular boundary, or enter p to create a polygonal
boundary. You must select at least three points to define a polygonal
mask. Once you have selected all the points, right-click and click Enter
on the menu.
To restore the image, you can use the IMAGECLIP OFF command or
Delete option. For more information, see the AutoCAD online Help.
You can also choose to show or hide clips by changing the image display
properties in the Image Properties dialog box. For more information, see 
 (page 58).
Quick Reference
Command Line
imageclip
Object Shortcut Menu
Image ➤ Clip
Converting a Mask to Image Clips
A mask is essentially a clip that can affect more than one image at a time.
If you want to remove a mask but preserve the clipping effect on the images,
you can convert a mask to image clips.
To convert a mask to image clips
Click Image menu  ➤  Mask  ➤  Convert to Image Clip. Then select the
mask boundary.
The mask is removed but the clips on the image(s) are preserved. After you
convert a mask to image clips, you may need to manually show or reload
Converting a Mask to Image Clips | 143