Everyone (especially seniors) should know this handy tip:
While holding down the CTRL button on your keyboard -- rotate the scroll wheel in the middle of your mouse. (see image on right)
Go ahead and give it a try, right now.
On most computers this will magnify / shrink the size of websites.
Rolling the mouse wheel up will make everything bigger, while rolling the mouse wheel down will have the opposite effect.
So, next time you are having trouble reading small text on a website, simply hold down control and use the scroll wheel. Very handy -- pass this on to your friends.
It's the best thing since... Ctrl+c.
Alternative method: hold down CTRL and tap on the + and - buttons on the keyboard for the same effect. For Mac users: hold down Command and tap on the + and - buttons.
Source: Blifaloo's Computer Tips