You can crop raster data within an image or across multiple images.
The only images that are affected are those that are within or partly within the selected entity or area. When you crop an image, the image frame size changes to compensate for any removed border data.
Crops use the current transparent color. For example, if you perform a circular crop on an image, then the area outside of the circle is filled with the transparent color. If you later change the transparent color, the color of the cropped area remains the same, but any subsequent crops are drawn in the new color. For more information, see Transparent Color of an Image.