Thanks to Owner-Manuals.com! This manual was exactly what I needed. As Amana was purchased by Maytag and later by Whirlpool, there was no way to receive it from their websites. I was lucky to find this resource.
A comprehensive Operating and Service Manual. All schematics are complete and easy to read. The PCB drawings and complete parts list are very helpful. I would definitely recommend this manual.
Text excerpt from page 47 (click to view)
This feature will help you adjust the picture you are watching to give you the best possible picture quality.
4:3 - Use this aspect mode when you are watching a 4:3 broadcast. 16:9 - Use this aspect mode when you are watching a 16:9 broadcast. This is also referred to as "widescreen", for example on a DVD disc. When you select this mode, black bars will appear on the top and bottom of the TV screen.
16:9 - If you select 16:9 aspect mode while watching a 4:3 broadcast, this will stretch the picture so as to fit into the 16:9 format. When you select this mode, black bars will appear on the top and bottom of the TV screen.
HD ZOOM - If you are watching a 4:3 high definition broadcast and you select this aspect mode, it will zoom in on the picture.
V STRETCH - If you are watching a 4:3 broadcast, this aspect mode will stretch the picture vertically on your TV