Position layers in 3D space based on their scale
The core part of Distribute By Scale is the 'Distribute in Space' button and the 'Final Scale' amount.
First, you must select some layers. You can select any number of them, however they should be 2D layers to get results ad expected. If your layers have key-frames set on them, a new key-frame will be set for the new position.
Once you have layers selected, all you have to do is click the 'Distribute in Space'. Layers with a smaller scale are moved further in the distance, layers with a larger scale are moved closer. There will be no apparent change to the layers position on the screen, but all the layers have been set to the same scale and moved into 3D space in order to match their previous size.
The 'Final Scale' amount sets the final scale of the layers after 'Distribute in Space' has been run. All layers will shar the same X and Y scale.
The 'Scale Options' give you quick options for scaling a group of layers in sequence. These options will identify the largest and smallest to use as boundaries and then scale each selected layer based on the boundaries and the type of scale selected. You must have at least 3 layers selected for any of these options to work. The order of the scaling functions are based on the layers current scale. If there are layers of the same scale in the selection, it will revert to selection order..