Should I use scale or offset? This gui will be used on computers not phones or tablets.
Yes. When you insert any GUI item, resize it and position it using scale only. So, instead of the size (or position) being {0, 100} {0, 100}
, remove the 100's and edit only the first numbers, so it would be {1, 0} {1, 0}
. A really easy way to do this is use bobafett3544's GUITweak plugin (http://www.roblox.com/GUI-Tweak-V1-2-item?id=185123829).