Use this dialog box to control what happens to image data outside the mask boundary.
Enables an existing mask for display. Enabling allows you to view the image clip as defined by the image mask.
Specifies that the images outside the mask boundary are not modified.
Hides the images that are outside the mask boundary.
Unloads from memory the images that are outside the mask boundary.
Specifies the visibility of image frames. If you choose Hide Image(s) or Unload Image(s), then you can select this check box to show the hidden or unloaded frames.
Draws a rectangular mask.
Draws a polygonal mask.