many years ago, when I had my Vectra 8 MHz 80286 I also used Drawing Gallery (not Graphing Gallery).
It came with nice outline fonts and produced nice drawings on a pen plotter.
Unfortunately I threw the disks away many moons ago.
So: does someone have a copy of this software?
The HP-Museum seems to have a copy of the "Charting Gallery", but not of the "Drawing Gallery" (only for the 150)..