krandtray (under menu as

system
|
Screen Resize and Rotate

its a kicker applet that allows you to adjust video settings on the fly

if you want it to auto start

go to

home
|
(your user name)
|
.kde
|
Autostart
in this folder place a link to application (right click option ) under command use krandrtray

next time you log in to kde it will auto start