The iPad’s smaller screen forced some changes to the OmniFocus user interface. The Note screen had to be sent to another tab. If you would like to request a feature change, you can go to the OmniFocus iPad app and send feedback in the Settings screen.
Thanks for feedback. I will do Your proposal.
I understand the reason to see the notes in separate window.
My proposal is following.
If no notes in task I see a grey icon.
If notes in task I see a black icon.