Catalog Group Icons
You can add icons for your groups. Add the icons to the location PATH_ABS_LIBRARY\FOLDER_FOR_CATALOGS\<group>_icon.png. The file type for the icon can be PNG (recommended), GIF, or BMP. For example, if you want to add an icon for the ISO group, the icon file name can be ISO_icon.png (recommended), ISO_icon.gif, or ISO_icon.bmp.
Although any image size for icons is acceptable, the recommended size is between 16x16 and 32x32 pixels.