so I am using ArcGIS Pro and I accidentally closed one of the map windows in my project (see picture). So are the maps, layout, scenes that you have open in your project saved somewhere or are they only saved within a single project in your C or D drive? I tried to browse back to see if those were saved somewhere else but I couldnt find them. What would you do in that case? or you just have to insert a new map, add the layers and continue with your work.