You will need to create a panel of the appropriate size in Cabinet Editor, use the Export Selection function, and then modifying the panel in Display Part Editor. You can then use the display part other times as well by scaling it in size.
Check the box for Transmission On right below the color choices so you can see through it. Then you can play with the color values to get the color of glass you are looking for. 255 for each value will make it invisible, then you can take away some blue and green to get the color you want.
I did play around with it and got satisfactory results but it could be better. When I first got Ecabs it came with a manual and in that manual they explained how to make the glass, wish I still had that manual. It was several pages long, it took you through the entire process needed to create and edit cabinets in the part editor / display part editor plus all other areas of the program.