Strange command input box at left-top of my desktop

[landylitianhao]

Hi all,

there is a strange command input box at left-top of my desktop, i don't know what that is.
it can not be cliked, and it turns visible when mouse is get into that area, and turns invisible when left.
it is fool.
i want know:
- what is that?
- why is it lanuched? or how is it launched.
- how can i close it?
- is it launched by shortkey? if so, how can i change/disable the shortkey?
attched is a screenshot.
Screenshot from 2013-03-04 22:41:57.jpg

[ali abry]

for me when i press ALT button it shows up .
did you try Esc button to exit it.

[Frogs Hair]

Alt + F2 invokes the command prompt which works like typing the application name into the terminal. If using an application like conky you can start the application by using Alt + F2 and typing conky which has no laucher. You can also kill/shutdown an application with a kill command.
Example:

killall conky

To close click the dash home icon.

[stinkeye]

What your seeing is the hud invoked by the alt key.
It gives you quick access to menu items of the currently focused application.

eg Your in firefox and you want to bookmark the current page
you can hit alt and start typing in bookmark and you will see
Bookmarks>bookmark this page come up.

My not seem very useful but with programs with a lot of menu items like gimp,
can speed things up a fair bit.

You can disable it in keyboard shortcuts.
Click on the key value then hit backspace.

Hit the windows+a key and type in "help" for a Desktop Guide.