I got the new UI design, for the moment I am adapting well to the new design but before if you do not have dev mode you were able to inspect the screens using the properties tab places in he up area of the right side bar tools, here is this tab now? how we can explore our design if we do not have dev more?
I think maybe you can find the answers in this link
In the link you sent me there is a properties section but dunno if works in the new UI3. The way to explore the design is not same as usual with a free account