Re: what is "The Charms"
Is it running Windows 10 or Windows 8.1? If it's running Windows 10 hit the Start Button and find Settings. Navigate to System>Display and somewhere in the middle of the Display settings is "Change the size of text, apps, and other items: " with a slider underneath it. If you're running Windows 8.1 you should be able to swipe in from the right side of the screen and open up Charms, and find Settings near the bottom. Do some searching around there as I can't remember exactly where it is.