Option click menu bar icon for alternate menu in OS X

When you Option click on the menu bar icons for OS X system utilities, an alternate menu with additional options will appear.

For the volume control, the alternate menu will let you choose input and output audio devices.

os-x-option-click-menu-icon-1

The Bluetooth alternate menu will include debugging information and tool to create diagnostics report.

os-x-option-click-menu-icon-2

When in doubt, just “Option click everything” in OS X, especially in menu bar icons and Finder.