Default Shortcut: None
Menu Path: Display > Frame Selection
The Frame Selection command will both center the current selection and zoom the camera so that the selection fills the active viewport. This is useful for times when you may have rotated the camera to a position where you cannot find the object you're working on, or to quickly center a new selection in the viewport.
If you have chosen to use Framed Selection for the View Rotation Center setting in the General Settings window, then a call to Frame Selection will cause the center of the view rotation to be updated to the position of the manipulator on the current selection, where it will stay until a subsequent call to Frame Selection or Focus Selection is made.