Autotek autocad raster design 2010 用户手册

You can add vertices to the boundary of an existing mask by selecting and
moving a midpoint of a mask boundary segment.

NOTE If you cannot see the image mask boundary, then enter REGEN to refresh
the AutoCAD display order.

You can use AutoCAD editing commands to move, rotate, stretch, erase, or
scale a mask.

If you want to change how the mask affects the images that are outside the
mask boundary, then you can change the mask properties, disable the mask,
or convert a mask to image clips.

By changing the image mask properties, you can control what happens to the
images that are outside the mask boundary.

For example, you can:

■

Unload the images from memory to enhance performance.

■

Display image frames when you use a mask so you can easily see where
the image(s) you masked are located.

■

Convert an existing mask to image clips.

■

Disable and enable a mask.

1 Click Image menu  ➤  Mask  ➤  Create.

2 You can clear the Enable Mask check box if you want to disable (turn off)

a mask. When the mask is disabled, you can still edit the mask boundary,
but the images are not affected until you enable the mask again. Only
one mask in model space or paper space can be enabled at a time. For
more information, see

 (page 141)

3 Choose one of the following mask options:

■

Do Not Affect

■

Hide Image(s)

■

Unload Images

Changing an Existing Mask | 139