How to add templates:
1. Tap the Gear icon in the top-right corner of the Library view then select Notebook Templates.
2. Tap the first dropdown list to choose the template size for your custom templates.
3. If adding as custom covers: tap the Default Cover preview in the upper section. If adding as custom papers: tap the Default Paper preview.
4. To add your templates to a specific category, scroll to the end of the list in that category and tap "+ Import" then From Photos/Files.
5. If you select From Files, you can then tap Select in the Files interface, select all your templates and tap Open.
How to remove templates:
1. Tap the Gear icon in the top-right corner of the Library view then select Notebook Templates.
2. If removing covers: tap the Default Cover preview in the upper section. If removing papers: tap the Default Paper preview.
3. Tap Edit in the upper right.
4. Choose the templates you want to remove.
5. Select the Trash icon in the upper left.