Extend selection to start of row

This shortcut will extend the selection from the active cell to the next cell to the left that is either empty or not empty, depending on the contents of the active cell:

• If the active cell is empty, the cursor will stop at the next non-empty cell to the left.
• If the active cell is not empty, the cursor will stop at the next empty cell to the left.
• Otherwise, the cursor will stop at the start of the row at the left edge of the worksheet.