Cross staff beaming in Finale

Cross staff beaming is simple:

1. Write the notes on the same staff.
2. Select the notes you want to move onto the other staff.
3. Press ⌘⇧↑ (macOS) or Ctrl+Shft+↑ (Windows) to move the notes to the staff above, or ⌘⇧↓ (macOS) or Ctrl+Shft+↓ (Windows) to move the notes to the staff below.

Check out the following video for a demonstration: