F5 - Function Key

Function Keys: act as shortcuts for performing functions such as saving files or printing data. Function keys are usually lined along the top of the keyboard and labeled F1 through F12, although some keyboards have fewer and others have more. Function keys also might be on either side of the lettered keys along the right or left edge of the keyboard. Function keys change their function depending upon which software is running, although the F1 key, for instance, often brings up a help screen.

F5 - Function Key: act as a Screen Refresher. It helps to update web pages. Use it and use it often!

Just a few of my favorites

CTRL+Arrow Key. Highlights one letter at a time.

 CTRL+Shift+Down arrow key Highlights entire paragraph.   

 CTRL+Shift+Left or Right arrow key. Highlights one word.

F1 Display Internet Explorer Help, or when in a dialog box, display context Help on an item.

F5 Refresh the current Web page.

F11 Toggle between full-screen and regular views of the browser window.

CTRL+S Save the current page.

CTRL+P Print the current page.