Masks and masked objects can be easily identified and selected using the thumbnails in the Layers panel. Thumbnails allow you to easily select and edit just the mask or the masked objects, without affecting the other objects.

When you select the mask thumbnail, the mask icon appears beside it in the Layers panel, and the mask's properties show in the Property inspector, where they can be changed if desired.

This is a picture of the feature being described.

To select a mask:

To select masked objects: