XFHHz‖

8dBXb‖Column Break

Joj4v‖Removes a manual column break to the left of the active cell.

pn8oW‖Position the cursor in the cell to the right of the column break indicated by a vertical line and choose Sheet - Delete Page Break - Column Break. The manual column break is removed.

To access this command...

ebLJB‖From the menu bar:

K5PTy‖Choose Sheet - Delete Page Break - Column Break.

qBbLh‖From the tabbed interface:

JGsxi‖On the Layout menu of the Layout tab, choose Column Break.