Crop bitmaps
Cropping removes unwanted areas of a bitmap. To crop a bitmap into a rectangular shape, you can use the Crop tool. For more information, see To crop an object or imported photo. To crop a bitmap into an irregular shape, you can use the Shape tool and the Crop bitmap command.
To crop a bitmap
.If you want to add a node, double-click the node boundary (dotted line) by using the Shape tool where you want the node to appear.
You cannot crop a bitmap comprised of more than one object.
You can also crop a selected bitmap after you drag the corner nodes by clicking the Pick tool 
, then clicking the Crop bitmap button 
on the property bar.