From here you can configure options that control how the screen saver should behave regardless of which Display you have selected.
Here is a brief description of each of the controls in the Auxiliary Settings panel:
Blank screen timeout –Determines the number of minutes that the screen saver will draw before blanking the screen and completely giving up the CPU to other applications.
Timeout before password is required - Determines how many seconds the screen saver should run before it will ask for a password when the mouse is moved or a key is pressed. This is useful for times when the screen saver kicks in while you are reading what’s on the screen.
CPU Usage - Determines how much processing time the screen saver receives when other applications are contending for the CPU. Keep in mind that the fact that other applications are running does not imply that they are placing a high demand on the CPU. In general, it is a good idea to keep this set to the “Low” setting unless the screen saver does not appear to be animating smoothly.