Hi Jakub -
Steve put this on the list a while ago → RH-10770 Bake to PictureFrame
I suppose (or hope) that, since this was filed, the solution isn’t simply baking existing details to picture frames, but that the contents of a detail are frozen until the user makes deliberate steps to modify them.
Also note, that in the “simple” case that you sketched here, you can create your new layer with your annotations, then make a new detail and select that. Right-click on the Layout On lightbulb and pick Layer On in Selected Detail Only -> All Layouts
-wim