Go to System Preferences, then Displays, then the resolutions are listed on the right. The highlighted choice is the resolution of your monitor. To choose a different one, just click on a different resolution.
Go to control panel, Apperance and themes, screen resolution. It will tell you what your settings are in (xp), should be close to the same in other windows OS
Measure it starting from the bottom left corner to the top right corner.
Extremely Low : 640x480
Low : 800x600
Normal : 1120x920
High : 1600x1360
Extremely High : 2240x2000
The Owner's Manual.
Answering "Why does your computer keep changing the screen resolution in vista?"
The best resolution to be used for ones computer screen is 1024 x 768 as computer screens are getting larger, the larger the resolution the better the visual data.
Resolution means the number of pixels that are on a computer screen.
Resolution of image is used to determine the quality of image in digital camera.
Resolution is the screen size (monitor). There are different types of monitors which are different size screens (resolution).
The screen resolution is determined by the monitor not the desktop.
the smallest unit of resolution on a computer screen
The measurements used to determine a monitors screen resolution is Pixels per Inch (PPI). The size of a monitor in inches and the total pixels in the horizontal and vertical directions determines the PPI of the screens resolution. For Example a 15 inch monitor has a maximum of 1024x768 pixel resolution.
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Some computer games have a set resolution for that game. Most of the time it is lower then the resolution of your screen so it has to automatically adjust for best game play performance. You can change these settings in the in-game settings.
They are higher resolution.
A resolution of at least 200 dpi is considered a standard for importing pictures to your computer.