To take your own notes make to a Bible verse, one uses the button MY NOTES in the toolbar of the lower window.

Selecting OPEN will bring you into the notes window and you will see all the notes created.
Selecting NEW allows you to create a new note.
You can give the note a description and also delete it.

Also at the top of the toolbar is NOTES.
Clicking here will also take you to the overview of all notes.