With the switch to the new version of OrbitNote, any annotations that were made in OrbitNote Classic will no longer be visible in the new version.
In order to make those old annotations visible, you will need to use the Recover Annotations feature:
Open the PDF that you would like to retrieve Annotations from -> then click on the 3 dots in the top right of the OrbitNote toolbar -> Recover Annotations
Allow a few moments while OrbitNote retrieves and downloads your annotations:
Once complete, a new file will be created with the existing annotations now available to be viewed in OrbitNote
Note:
This will "Burn" the annotations onto the page, so they will be visible but unable to be edited.
Larger PDFs may take some time for the annotations to download