'ctrl' + '0' (zero)
This simple two key combination will reset your brower's zoom to default and you'll now be able to view websites how they should look.
Is the font on a website too small?
'ctrl' + '+' (plus)
This two key combination will enlarge a website's content for you. And with the opposite, you can make a website smaller:
'ctrl' + '-' (dash)
If you use the scrolling wheel on your mouse while online, and hold the 'ctrl' key while scrolling, it also makes the page shrink or enlarge. This is how my page often changes size on accident.
Hope this quick tip helps! Have a great Tuesday!