Really there is only one keyboard trick in Apperception. But it happens to be really quite cool if you are using the registered version with a zillion little icons on the right side of the screen.

If you press the space-bar a 100x100 blowup of the icon under the mouse arrow will be displayed. No more squinting.

The only mouse trick worthy of mention is of equal value. If you find clicking the eyeball on the instrument panel a bother try clicking anywhere inside the large image area.

Clicking inside the large image will cause a new cluster to be assembled and presented for your processing.

That's it.