To determine whether images appear in gray scale or color:
Choose Options from the File menu.
Select either Gray Scale or Color for the View Image In setting.
If you chose to display images in color, set the Color option to the number of colors you want used.
The Color setting depends on the type of display monitor you have. For example, if only one option, such as 256, appears, that is the only option available on your monitor.
Click OK to activate the settings and close the dialog box. Click Apply to activate the setting and leave the dialog box displayed.