There is a much better way: open gconf-editor, move to apps>panel>toplevels. There you will find the entrys "fit, rotate,stretch". This is a better way bacause it works even if you put your panels on the left or right side.
There is a much better way: open gconf-editor, move to apps>panel> toplevels. There you will find the entrys "fit, rotate,stretch". This is a better way bacause it works even if you put your panels on the left or right side.