Dont you hate the clutter, wish you could minimise the Info to a bare minimum to give more screen to play with....

H = Hud ... Pressing H can make a lot of info go away, press it again to get it back.

H mode (minimal mode) Keyboard Shortcuts.

Press B to get the mini map back.

To be able to select Ammo for your lasers and Rockets
Ammo: 1 gets the X1 ammo, 2 gets the X2 ammo and 3 gets the X3 Ammo, all on the keyboard mind, am unsure about the Numeric Pad.
Rockets: same as above E for the x1 rockets, R is the X2 rockets and T is the X4 rockets.

Configurations: C to change the configs. Look at the top of screen to see what config you are in.

Firing Lasers and Rockets: for the Lasers press Ctrl and for Rockets press Space.