How do I set the game compatable to aspect ratio.
By setting it to play in a compatible resolution -- if you have a widescreen monitor, use a widescreen resolution.
I don't even know what that is?
This video explains aspect ratio. https://www.youtube.com/watch?v=8R-MWZvfXbU
His explanation is oriented more towards displaying movies on TV screen's than games. But the same problems happen with 4:3 aspect ratio in games on a 16:9 widescreen computer monitor as happen with old movies like Casablanca (unless they've been cropped) on a new widescreen TV.
Are you changing the resolution from the options menu of the game, or are changing the desktop resolution? Desktop resolution should usually be set at maximum.
What video card do you have?
Does your monitor have any settings that allow you to adjust how the picture is displayed?
Also I don't have the subtitles.
If you set the game to display subtitles and you're missing the bottom of the screen, they're probably off the bottom of the screen.