Keeping graphic objects in programs

[cahlucas]

Hi all,
The program I'm currently making uses a lot of graphic objects, and it takes time to create them on the screen. That is why I want to save these objects in the program, ready to use, in such a way that they do not have to be built up completely, but can be displayed directly on the screen. You can compare this to a GROB that you keep in a variable on the HP-50g, ready to display on the screen. I know this is possible because it is done in the PhysicsElectronics program (https://www.hpcalc.org/details/7773), possibly in even more programs. Can someone explain to me how to create something like this? Sincerely, Karel.