Those are zoom controls. They enlarge/reduce the size of your whole screen, not just the text size. In IE's lower right window frame corner there are some preset zoom levels. They are very close to the scroll up/down slide button and can be triggered without having to hold 'ctrl' or a mouse wheel. They are at the magnifying glass with the plus sign in the glass, 100% and a little pull down menu pointer.
_________________________
If you aren't seeing Heaven while you dream, you're doing something wrong.
Dreams allow escape from the passage of Time.
The ultimate activity is the Dream.