The Image bounds settings are here Images: 1920x1080 and Thumbnails: 800x80. Selected: thumbnail height is 15% of the screen height. The theme image, which is fetched from the jAbum folder panel, is displayed as a background image with a constant height of 180px.; it is disabled for display in the thumbnails table and as slide page. You can start a non-circular slide show without animated slide transitions. This slide show can be stopped or restarted by clicking in the lightbox image.The index page buttons do have a transparency of 50%..