Set up older LaserWriter 16/600 PS with Yosemite
I recently purchased a new iMac 5K and of course it came with Yosemite installed. I have a legacy Apple LaserWriter 16/600 PS printer. When I set up my new iMac I managed to easily find the LaserWriter and select it as the Default printer. But I cannot find a way to add the ability to print to the Multi-Tray. The Multi-Tray holds paper or envelops. Can anyone help with this?
Additional info:
My wife has a mid 2011 MacBook Pro. I was able to set up the LaserWriter 16/600 for her MacBook Pro and she can select the Multi-tray in her Print dialog box. I did the set up when she had Snow Leopard on her MacBook. I has since been update to Yosemite and she still has the Multi-Tray option in her print dialog box.
iMac (Retina 5K, 27-inch, Late 2014), OS X Yosemite (10.10)