I'm in the early process of getting to grips with Arc Pro and one issue I am constantly experiencing is that my inset map frame uses the same data layers as my main map frame (layout view). They appear to be linked so that when I delete a layer from the inset map it is also removed from the main map layers. It is the same with making a layer invisible as this makes the same layer invisible on all map frames.
Is this a simple check box that just requires disabling or a standard feature in Arc Pro.
Thanks in advance