Computerworld - https://www.computerworld.com/article/3247704/apple-mac/5-printing-secrets-every-mac-user-needs.html#tk.rss_all
Everyone knows how to print from their Mac, right? You just hit the Print button (or Command-P) – but are you using these print-related tricks?
How to print from the Dock
What if you didn’t even have to open documents to print them? What if you could just print from the document icon in Finder using drag-&-drop? You can, here’s how:
Open System Preferences>Printers & Scanners. Look to the Printers list and select the printer you want to use. Drag-&-drop the printer icon from the list to your Dock. You should see the icon for that printer appear in your Dock. Quit