Escape: Close any open panel.
Up arrow: Zoom view in.
Down arrow: Zoom view out.
A, D, W, S: Change map view position.
Ctrl + click (or middle mouse button): On an empty square, build the previously build defense. On a square that already has a defense built in it, upgrade that defense is possible.
Shift + click (on another nation’s square): Splash attack.
Shift + click (on your own nation’s square): Salvage a defensive structure, or evacuate the square if it doesn’t contain a defense.
Ctrl + shift + click (on your own nation’s square): Salvage any defensive structure in the square, and evacuate it.
Alt + click: Begin a “Move To” this square, if possible.
Next: Creating an Account