I'm loving the new markdown editor in TheBrain, so thank you very much for implementing it.
I would like to suggest a new button in the notes pane that will switch the notes pane from view to edit modes, therefore allowing the user the keep the notes pane in preview mode. The toggle would allow us to select and copy the formatted text from the notes pane quickly, as currently when you click in to select text, it changes to edit mode. I do know about the Open in Browser preview, but I feel this would be a far better implementation. I personally would prefer a button in the tool bar, that has a keyboard shortcut to quickly toggle between the two modes.
TheBrain 11 Alpha Channel
I would prefer all notes with text in them open in preview mode (empty notes should open in edit mode), so a global setting should also be added for those who prefer notes in edit mode vs preview mode when they are clicked into or highlighted.
Windows 10 2004 Enterprise