If you delete a document, it will be moved to the trash bin first from where you can recover it if necessary. The trash will not be emptied automatically. There are two ways on how to delete documents in GoodNotes.
1. Use the Select button to delete multiple items
If you want to delete multiple documents and/or folders at the same time, tap on the Select button in the upper right of the documents tab. Then select the items you want to delete by tapping on them once. Tap on the Trash icon at the top and confirm.
2. Use the down arrow to delete a single item
Every document or folder has a down arrow next to the title and information. Tap on it and choose "Move to Trash". Then confirm.
Find out how to recover documents from the Trash here.