When displaying the Add Bloq menu as a grid, you can assign an image or icon to the bloq. The Image field uses ExpressionEngine's native File Manager, so you can add any image you want. It is recommended to keep your image in the 50x50 pixel dimension. You can also use one of the existing Icons from the Font Awesome library that is available through ExpressionEngine. The Preview Icon field is only available in ExpressionEngine 6 or greater.