Edit online

To close open documents, you can simply click the close icon () for the particular editor tab or use one of the following actions that are available by right-clicking the current editor tab (or from the File menu):

Close (Ctrl + F4 (Command + F4 on OS X))
Closes the currently selected editor.
Close Others
If multiple files are opened, this action is available to close all opened editors in the current group/stack of tabs except for the one you are currently viewing.
Close All (Ctrl + Shift + F4 (Command + Shift + F4 on OS X))
If multiple files are opened, this action is available to close all opened editors in the current group/stack of tabs. If this action is selected from the File menu, it closes all opened editors in all groups/stacks of tabs.