I had just sort of always assumed that I could only have one screen open when working in the admin area.
But it’s not true - you can have multiple screens open! Right Click - new tab or window.
This saves loads of time - while I am waiting for the server to upload or jumping back and forth.
Is it just myself who has been a dummy - or anyone else prepared to confess? :oops:
Page - Nope, just you. 
But nice to remind people that this can be done with the later browsers.
I use separate tabs frequently when processing orders… open a new tab for each order, I can copy/paste similar messages to all before I complete the order, etc. Saves much time from going back and forth between all and individual orders.
Same goes for editing products if you don’t want to do the import/export thing.