If the active cell is empty, Excel will extend the selection to the first non-empty cell to the right. If the active cell is non-empty, Excel will extend the selection on the last non-empty cell to the right. On a Mac, the command key (⌘) can be used instead of the control key.
In this video, we'll take a quick look at the information provided by the status bar. The status bar provides real-time data about currently selected cells and can give you a lot of useful information.