Add Layers... - This will bring up Tiles Setup screen dialogue.

Add Fractal Layers... - This will bring up Fractal Layers dialogue.

Bring To Front - This will bring selected layers above the rest.

Send to Back - This will sends selected layers under the rest.

Shuffle Layers - This will randomly reorder all layers.

Select All - This will select all layers.

Remove Images - This will erase images from the selected layers and replaced them with semitransparent placeholder filling

Remove All Layers - This will delete all layers (no matter if they are selected or not).

Strighten All Layers - This will set rotation to zero angle for all layers (no matter if they are selected or not).

Scale Up All Layers - This will increase sizes of all layers (no matter if they are selected or not).

Scale Down All Layers - This will decrease sizes of  all layers (no matter if they are selected or not).

Sort Layers Asc - This will brings layers with better scored pictures to the front. See Sorting Layers for more details

Sort Layers Desc - This will brings layers with better scored pictures to the back.