Screen resotuion sizes are individual depending on the screen size of the computer you are using - remember the larger the screen resolution you choose the more RAM it needs and some games may run slower.
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.
If everything on your iMac screen appears larger than normal the screen's resolution will have been changed - probably by some game that failed to switch it back again. Open System Preferences and then click on the Displays button. You can now select from available screen resolutions. The greater the resolution the smaller items will appear on the screen.
That is hard to answer without knowing more details about the actual computer. What is the resolution that your monitor is currently set at. Does the actual game support that resolution. It appears it is defianatley a resolution problem. Research the supported resolutions for the game that you are trying to play, then see if your video card has a matching resolution. If the monitor is a "wide-screen" then you may need to set the resolution to a standard montior size to play the game.
change the resolution in the game
No, it renders on both Xbox360 and PS3 at 720p. The hardware then stretches the image to your screen. The info on the back on the box where it says "resolution" is the resolution of TV the game will support, not the resolution the game renders at.
The in-game settings are set low. If you are on a computer you need to enlarge the resolution, on a console you need to check the in-game settings to adjust your screen.
The best resolution for World of Warcraft would depend on the users hardware. If the user got a screen and a computer capable of running a high resolution the most common is to put the application to it's highest resolution possible. So in short, the highest resolution you can use is the best. But if you experience problems with the game performance such as drops in the average frames per second, you could consider using a lower resolution as that would lower the stress on your computer.
chang the resolution in the game
This was a problem with Windows Vista, but as far as I know it was fixed. It will be the resolution your computer is running the Game as. You may have to go into your Combat Arms settings and change it to a more perportional resolution for your computer screen.
You buy the game then it will appear on on the home screen and you click it.
opeen the game and enter into options....in display settings increase resolution to max u have....bingo full screen
set your screen resolution to the lowest settings, in-game. Or you could try setting the screen options to "Window". Which allows you to play the game in a window, instead of a laggy fps fullscreen.