How to add a row or column
In the layout editor, hover the mouse pointer over the bottom left corner of the grid until you see the Grid tab, then choose the tab. Guide cells appear at the top and left side of the grid, as shown in
Guide cells support adding rows and columns
Right-click the guide cell next to where you want to add a row or column.
Choose one of the following items from the context menu to add a row or column in the desired location:
→Column to the Right
→Column to the Left