I’ve never understood why some of the constraint options become unavailable when a frame once a frame is set to fixed position.
Like, why is it that I can’t set a frame’s position to “fixed” and then set it’s constraints to “left and right?” But setting the constraint first and the position second works fine?
On a similar note, I don’t love that the position control was moved into the prototype panel. Settings things to fixed position is super useful for correctly setting up layouts, testing how things will work on different screen sizes, etc. That particular control has a whole lot of utility before I ever get to the interactivity portion of a project, and I wish it were still available from the design panel as well. At the very least, it would be nice to have a shortcut for it in the quick actions menu.