Very basic to know:
B=Build
S=Storage
T=Topics
A=Assign (Scientists), Start, Activate
I=Idle
Menus:
R= Resources Report
----Alt+C = Colonist Information Menu
----Alt+M= Morale Status
----Alt+P= Power Status
----Alt+F= Food Status
----Alt+N= Ore status
F= Factory Report
---D=Details ---> Select factory you want, click details, takes you to that Factory.
L= Labs Report
-----C= Completed (shows all technologies you have reserched)
-----D= Details, same as for vehicle factory.
C= Communication Menu (Displays current mark, as well as events.)
---- J= Select event in list, click J. Takes you to event location. NOTE: Only works on events that occure at locations, for example, structure kit manufactured, reserch completed, disaster, battle report, disabled building)
---- A= Brings up Allies menu.
P= Space Report. Shows all satelites you currently have in orbit.
G= Game Options
-----Alt+O= Objectives
Rest you can figure out, all highlighted letters listed are hotkeys. All you see in yellow is normal lettering. Red letters are hotkeys.