I must have accidentally changed the settings, and now my toolbar (top part of the window) has enormous text. It is very zoomed in but does not change when I zoom in or out of a document. It is particularly frustrating when I control F for items and the find bar takes up half of the page with how zoomed in it is. Again, this has nothing to do with the document zoom, just the toolbar.
Could you please try changing "scale for screen resolution" using the steps given in the following links and see if that helps?
Let us know how it goes.