As a complement to the Quick Start Guide, we've put together diagrams of the basic controls for both the Planetarium and Flight Sim!
Also included are a separate keyboard diagram for visibility controls that work in either mode, and a mouse diagram for the Universe Map since it works a little differently.
The goal with these is to be able to have them up on the second monitor or in alt + tab range as you learn the program, and to give more visibility to how many tools you have in SE! The full .zip contains all diagrams as PNGs, as well as a combined PDF, all of which are posted below.