Be able to paint and clone while still in composition viewer

From what I’ve seen (and I’d be delighted to be proven wrong), since cloning and paint have to occur in the layer viewer, there is no way to actually see the composition while working on these things. (You can/have to open a second viewer and watch there, but that should not be considered an acceptable workaround.) These features should either be able to work on layers while still in the composition viewer, or there should be some way to view the entire composition while in the layer viewer. This is one of those “how-the-heck-haven’t-they-fixed-this-after-20-plus-years” things.