To display and plot a subset of the images in your drawing, you can create a mask.
A mask clips the images that are inside the mask boundary and hides or unloads the images that are completely outside the mask boundary.
A mask is similar to an image clip, but a mask can affect more than one image at a time. Like a clip, a mask does not permanently modify the images. You can disable the mask to redisplay all of the images and you can also convert a mask to image clips. For more information, see Enabling or Disabling a Mask, Clipping an Image, and Converting a Mask to Image Clips.
You can mask images using a rectangular or polygonal mask boundary. The mask boundary is an AutoCAD object that you can move, stretch, scale, and erase like any other AutoCAD object.