- On the ribbon, click
Raster Tools tab
Edit panel
Process Image drop-down menu
Change Color Depth.
- Select the image or images you want to change, and then press
Enter.
Note: You can also select your image or images before you select the Change Color Depth command.
- Choose a color depth and press Enter.
Note: You can adjust the pixel depth of multiple images if all selected images have the same pixel depth.