To Create a New Mask

  1. On the ribbon, click Raster Tools tab Manage & View panel (expanded) Create Mask.

    The New Image Mask dialog box is displayed.

  2. Define the mask properties. For more information, see Changing the Image Mask Properties.
  3. Click either Rectangular or Polygonal to draw the mask 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 shortcut menu.

    The mask clips the images that are inside the mask boundary. Depending on the properties you set for the mask, the images that are completely outside the mask boundary are hidden, unloaded, or unaffected.

Note: You can have two enabled masks per drawing: one in model space and one in paper space. If you create more than one mask in model space or paper space, then the most recently created mask is enabled, and all other masks in that space are disabled automatically. For more information, see Enabling or Disabling a Mask.
Parent topic: Creating a New Mask