Comment 60 for bug 668415

If you have two monitors, and have the right one as the primary, it is extremely difficult to mouseover the correct area to get the launcher to appear fully, as it's on the edge between two screens.

If it's impossible to move the launcher to the right of screen, it's impossible to use dual monitors with the right one as primary.

Setting the left monitor as primary is not always an option, surely moving the launcher should be?