Ascend – Increase layer offset by one frame each click from the bottom layer to the topmost selected layer.

Descend – Increase the layer offset by one frame for each click from the topmost layer to the bottom selected layer.

Random – Randomly offset layers by entering the minimum and maximum number of frames by which the layers should be offset.

Sequence – Sequence the layers in the order of selection. 

CTRL/CMD:  Reverse the step direction. (supported modes – ascend, descend, and patterns).

SHIFT: Increment the offset by ten frames (supported modes – ascend, descend, and patterns). When sequencing layers, the sequence will start from the first layer in the selection, hold SHIFT + Sequence to start sequencing from the last layer in the selection.