Apple Pages 2 - Manual (Page 13)

Preface Welcome to Pages 13
Custom Shapes and Masks
Crop images by using masks of different shapes. Choose from the many predrawn
shapes included with Pages, or create your own custom shape to use as a mask.
Masking lets you reveal only the part of an image you want to show in a document,
without altering the original file.
Create a custom mask to
frame part of a photo.
Position the mask over
the image, and then
optionally edit the mask.
Here, it’s rotated and
resized.
The original image is
framed by the mask.