Enable control of WinDVD Window:

With this setting enabled the rest of the WinDVD Window section will work. When disabled, WinDVD Tweaker will have no effect on WinDVD.

Lock Window:

This setting enables a regular check of the Windows Position and Size. This check makes sure that position and size are as they should be. This setting should be enabled for best results as sometimes WinDVD will change its Window Size.

Automatic Window Size Mode:

When enabled, you can simply select the source aspect of the DVD you are watching and all Window Size calculations will be done automatically (recommended). When disabled you will be able to enter custom sizes for the WinDVD Window. The DVD Aspect is usually wrote on the back of the DVD package and there is usually a note that says eg. "Enhanced for widescreen TVs" which indicates that it is Anamorphic.

Window Positon:

The window positon setting defines the placement of the top left corner of the WinDVD Window. The x and y settings for this position can be defined using "Custom" settings or automatically calculated using "Center" or alignment. See the WinDVD Window Options Help for more information on top and bottom alignment.