To transfer your notebook from Outline for iOS to your Mac / PC, please do the following:
1. Export your notebook from Outline to iTunes. You need to double-tap your notebook's cover > Export > Export to iTunes. Your iPad must be connected to your PC with iTunes installed.
2. On your Mac / PC run iTunes, select your iOS device and go to Apps > scroll the page down to get to File Sharing > click Outline icon to get Outline Documents active >click your notebook and Save to...
If you want to move the notebook from Mac / PC to iOS Outline, compress the notebook folder and upload it to Outline Documents in iTunes with Add... button.
Then connect your Mac / PC to your iOS device with a wire and run Outline.
In Outline tap the + icon > Open from iTunes. Select your file and enjoy new functionality.