Right-click the mosaic in the Job List to which you want to add tiles and click Tile Options.
The Tile Manager appears.
Select a tile in the tile list and click Crop Tile.
The Image Crop dialog box appears.
Select a cropping format and enter a crop region.
Alternatively, click Show Image to select a cropping region using the graphical cropping tool.
For more information on cropping images, see The Image Crop Tool.
NOTE: You can only crop the tiles of a raster mosaic.