Documentation about MuJoCo's user interface

[davidhozic]

Does there exist any additional documentation (perhaps internal) that would describe using the UI framework in MuJoCo?

The code itself is readable to a point, however I don't quite understand what exactly the string codes are supposed to represent:

E. .g,

• "AO" from {mjITEM_SECTION, "Option", mjPRESERVE, nullptr, "AO"}
• "CL", from {mjITEM_BUTTON, "Reload", 5, nullptr, "CL"}

And perhaps what exactly do the numbers for state mean (mjPRESERVE and 5 above)? Is there an enum for that perhaps?

I'd be nice to have some more details on this.