How can I get a lane (down) arrow beside an exit panel?

1. First, create a sign without the lane arrow.
2. Click on the first icon on GuideSIGN toolbar, Program Settings -> Locks, and uncheck 'Auto update panel' option.
3. Place the lane arrow using Snap to margins.
4. Now you have a completed sign.

Note: Make placing the lane arrow the last step of creating the sign. Updating the panel will not preserve the spacing relationship.