I don’t have a Facetron, so I can’t tell you off hand. But my answer is Experiment and Observe. For side to side tilt, coat the table with magic marker, then swipe it across the lap. Look at where the ink is rubbed off. Now change the cheater a bit and do it again. You’ll soon get comfortable with what direction and how much.
For front to back tilt, do the same thing, but adjust the height of the head on he mast.