This is a configuration issue.
To enable wraparound, run CompizConfig Settings Manager (you may have to install it):
Desktop -> Dekstop Wall -> check the Allow Wrap-Around box at the top
Then, it will behave as you suggest above with both left/right and up/down wrapping.
This is a configuration issue.
To enable wraparound, run CompizConfig Settings Manager (you may have to install it):
Desktop -> Dekstop Wall -> check the Allow Wrap-Around box at the top
Then, it will behave as you suggest above with both left/right and up/down wrapping.