For every template you save in the Custom Library, you can assign an image, in order to have a visual clue of the template you are about to import.
The Default Placeholder image
By default, Custom library assigns a placeholder image to all templates. You can change this default placeholder image by going to Settings \ General and upload a new image at the “default placeholder image” field.
Setting a Custom Template Image
For every template, you can always override the default placeholder image by. Simply go to the template page, and assign a featured image to the template. This will replace the default placeholder image with the one you just selected.
