How do you ';change the screen resolution and color depth '; on your computer to play a game???

Right click the desktop and go to properties, the last tab is the settings tab, that is where you can change the settings.How do you ';change the screen resolution and color depth '; on your computer to play a game???
go to start click on control panel click on appearence and themes then change screen resolutionHow do you ';change the screen resolution and color depth '; on your computer to play a game???
right click the desktop, and choose properties, bring it to high