Problem: As of right now, you can only open one instance of PowerApps Studio. If you wanted to copy paste content from one app to another, you would need to:
This can only be done one screen at a time. Also, content copied from an app opened in a web browser cannot be pasted into another tab nor into Studio.
Suggestion: To overcome this limitation, I suggest a way that allows copying content from an app opened in a web browser to paste in Studio or another browser tab.
Scenario 1: This is useful for copying formulas and objects from apps you've downloaded from blogs to add to your own app.
Scenario 2: You have a template app whose features you want present in new apps you make.