You can destroy unwanted structures and ships. Below the picture icon on the HUD (The large box in the bottom center of the screen), there's a button that allows you to scuttle a selected structure or ship. Select the unwanted unit, then press scuttle. After a certain amount of time, the unit will be destroyed and you will recieve a fraction of the resources you used to build this unit back. If you want to end a scuttle, press the button a second time.

yeah you can, in the center bottom of the screen, go right down to the bottom of the center of the screen, and it should have a button saying 'scuttle'.

you can also use the shortcut key, i think its shift + S...

Wow you people acutally use the Shift+r for retreat, I usually just click my ships but how do you mistake the shift s with shift r they aren't evne on the same row let alone beside each other

My ring finger tends to rebel.

be prudent

do both