No roll option available.

thats one the a joystick might have over FL's mouse control (but the mouse kicks ass - saves space on my crowded table ) is the third, or z axis, allowing rolls... but otherwise if u are in spacebar mode, so u go where ur mouse is, then its easy to get flipped over after doing some spins and loops...

Did somebody say my name?
-Gamma Wing
It's the dreaded G-Man[![![![!
-Moose

Well there is a config option you can add manually that let's you roll with keys...don't know what it is, though, I saw it on the forum a while ago.

But rolling isn't necessary in this game, or most any space flight game ever made for that matter.