Focus view.
I use Agenda as project management for my clients, and often we have a weekly online meeting, where I share my screen. But even though I can collapse other Categories, the customer will still be able to see names on other categories, which often would be other clients’ names.
So if Agenda could have a Focus view, where I only showed the chosen Category with projects below, I imagen that I could open a new Agenda Windows with only this View, best if I could mark which project’s I would like to show, since a customer could have more than one Category with project and subprojects below.