Exceljet

Quick, clean, and to the point

Extend the selection to the last cell left

Windows shortcut 
CtrlShift
Mac shortcut 

If the active cell is empty, Excel will extend the selection to the first non-empty cell to the left. If the active cell is non-empty, Excel will extend the selection on the last non-empty cell to the left. On a Mac, the command key (⌘) can be used instead of the control key.

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