Resolution means how many pixels are going to be displayed horizantally x vertically. Depending on the size of your monitor the pixels will be stretched to fit (or enlarged, whichever sounds better), so its best to use a higher resolution with a larger monitor so you get a better quality picture that isnt all blurry grainy.
To do this, set the IntelliPoint control panel customization for Internet Explorer:
Press and Roll Forward Type "Command +"
Press and Roll Back Type "Command -"
