I cannot turn pages horizontally

If your notebook only scrolls vertically, Vertical is likely selected as its scrolling direction.

Change the scrolling direction

1. Open the document.
2. Tap the More (...) icon in the top-right corner.
3. Tap Scrolling Direction.
4. Select Horizontal.

You can also access Scrolling Direction from either of these paths:

• Goodnotes menu > Settings > Document Editing
• More (...) > Document Editing > Scrolling Direction