Goodnotes: Importing Files Into GoodNotes 5
1. To import one file, tap on it.
2. To import multiple files, tap Select in the upper right of the file's interface, select those files, and tap Open.
3. To import from an external app, open or select the file in the other app and tap the Share icon then select either "Copy to GoodNotes" at the top row of apps, or "Open in GoodNotes" in the list of apps.