Keyboard Shortcut. A keyboard shortcut is a key combination that performs a certain command, such as closing a window or saving a file. ... You can also usually close a window on the Mac by pressing "Command-W" or by pressing "Alt-F4" in Windows.
link
Here are some images for a better understanding
<
for more pictures relating to keyboard shortcuts visit link
if this post have been of help to you kindly encourage me by hinting the upvote button as i'm still trying to contribute to steemit cummity to make it a better place for everyone thank you.