Things in SEIV I never knew about....

[FadingSuns]

I just found out something that is probably incredibly obvious, but I'm hoping that someone here will give me a hand with it. Up to this point I've been creating a new race with unique characteristics every time I play. For the first time the other day I choose a race from the TDM-Modpack and noticed that the colinized planets that appeared in the system window showed letters to indicate what facilities were currently built. After experimenting around, I also found that some races had all planets, colonized or not, showing the planet name in the main system window.
I've torn the manual apart looking for a hotkey that will turn these lables on or off and haven't found a thing. Like I said, this is probably and obvious one, but does anyone know how I can flag planets to show what facilities are built or at least show the planet's name?