I am using 13.04 on a laptop with an additional screen connected so that when I'm designing websites, the 2nd monitor is used as a preview page to reduce the need to shuffle through windows to find the one I need.

The Problem

The problem is that I can easily move from the main screen to the 2nd screen (on the right) without any problems, however, getting back to the working window, Screen 1 I hit a barrier at the screen edge an I have to take a run up and force my way over what seems like a barrier.

The Question

Can anyone tell me where the setting is for reducing or eliminating this 'step' between screens.

Thank you in advance.

Edit

This was happening when I had the Unity Launcher displayed on both windows, but stayed there when I selected the option to keep the Launcher on the main screen (Screen 1) only.