Initialize Time Machine backup without clicking the menu bar icon Is there a way to start 'Backup now' without going to System Preferences, enabling Time Machine Menu bar and clicking it if I have the icon hidden?

Clicking on the drive doesn't let me backup:
tmutil is a command line utility for "controlling and interacting with Time Machine." Try man tmutil. (I'm on OS X 10.10.4).

You can also control/right click on a Time Machine drive in a Finder window or sidebar. If a backup is running you can stop it, if not you can "Back Up Now."