Use the File > Close command or the [Ctrl + W] keyboard shortcut to close the active document in the document group.
If the document itself, or changes within the document, have not yet been saved, you will be asked whether you wish to save these changes or not.
Alternatively, you can click the button with the cross 
. You will find this button on the top right in the document group.
Closing all documents
To close all loaded documents use the File > Close All command.
Closing all documents immediately
To close a document immediately without a query, close it with the [Shift] key depressed. Data you have not saved will be lost.
See also
3815 19092012