I recently switched from SU Make 2016 to 2017. I had my 2016 workspace set up with a Materials tray that had two sections. The top was standard SU materials, and the bottom was my customs materials library:
I don’t remember how I did this, and I can’t figure out how to do it in 2017.
To get the secondary pane displayed, click on the little button below the two Xs in the top right corner. In your screen shot it shows with a - and an up arrow. Without the secondary pane displayed it’ll show a + and a down arrow.
As for your custom materials, where did you put them for SU2016?
Doh! It’s all coming back to me now! I have my custom materials in a folder that I created for my custom components and stuff. Thanks, Dave!