moves, flips, rotates or (re) scales a layer, page or group.
Layer/Page/Group to be moved/scaled;
Move X/Y: position, in pixels, where the object should be moved;
Scale W/H: scale, in percentage. The lock button sets both scales to the same value;
Flip Horizontal: flip the selection horizontally;
Flip Vertical: flip the selection vertically;
Rotate: rotates the image according the angle specified here;