While GML built-in functions as a whole is volatile, certain basic sections of it aren't --- think basic control structures, collisions, I/O, math and string functions. These also happen to be the same functions that monopolize most of the active logic in a game project. It's an extreme case of Pareto's Law.no, and pointless to as things get added and taken away at any time, maybe a ereader is what you need.
Printing to PDF is a Windows 10 feature, it doesn't exist in Windows 8.x or earlier. Although earlier has the ability to print to XPS. Being able to print to PDF on pre-10 can also be accomplished through some third party print drivers.pretty sure you can open the manual and print a chapter, then target a PDF output..... I'm sure some one pointed this out in the past. And yes.... printing for your own use is fine.
EDIT: yes, just tried. open up the help (F1), select a folder in the contents and right click. Select print. You can then select PDF there.