When you are surfing on the internet, sometimes you find the page with the font size too small or too big.
And of course you want the perfect size , comfortable according to you. so we need to zoom in or zoom out.
For all browsers ( Mozilla firefox, Opera, Safari, Chrome ) the keyboard shortcut key to make zoom in or zoom out are the same.
Press Ctrl + + to make Zoom in
Press Ctrl - - to make Zoom out
Press Ctrl 0 to go back to the Original size.
See also :
Mozilla Firefox Keyboard Shortcut