What have I done?

[foreright]

Help. I have done something that causes the two task bars to disappear on my Internet Explore like they do on the taskbar on the bottom. Except I cant find where the facility is to lock them back permanently.
I've obviously pressed a combination of keys. Any ideas, please.

Please ignore Iv'e found it F11

 

[manoz]

Yeah you made it fullscreen, lets you have more browsing room