Under the window's title bar, click and drag the split bar down.Splitting a Code Window Into Panes
You can split the Code window horizontally into two panes to view different code segments for a form or module at the same time. Each pane scrolls separately, both horizontally and vertically. The Procedure and Object box options refer to the pane that has the focus. Code changes are immediately reflected in both panes.
To split the Code window into panes
Under the window's title bar, click and drag the split bar down.
To remove a split from the Code window
Click and drag the split bar back up to the title bar.