I have been using the Notes Document feature of Logos quite extensively, making numerous notes on various verses of the Bible. While this is a great feature, I find that its capability is very limited. For example, it does not allow me to import a graphic image into the note. Although you can "undo" by hitting Ctrl-z, it would be nice to have an icon for that on the toolbar in Notes.
Recommendation: Take a look at "e-sword" and its Note capability. This is a free software, and this particular feature on e-sword far outshines Logos. I see no reason why Logos could not upgrade this feature.
I hope someone is listening.