Update ·
Arrows on the storyboard
Drag the arrow on a scene onto another to link the two, or let go on empty board to add a new scene right there.

The arrow on a scene card is now something you can hold. It wakes as your pointer comes near and leans toward it.
Link two scenes
Press the arrow and pull. The line follows your pointer like a rope and straightens itself out. Bring it close to another scene and the arrowhead springs onto it and the card lifts. Let go and the two are linked.
Add a scene where you let go
Let go over empty board instead and a dashed New scene card shows where it will land. Release, and the new scene appears right there.