"By which I infer that the PDF library is now part of the central core of Processing so I do need this line at the start"
It always was part of the core libraries of Processing (at least for several years).
But being a core library, the import is still necessary.
I never saw this message...
Have you named your sketch pdf or PDF or similar?
It always was part of the core libraries of Processing (at least for several years).
But being a core library, the import is still necessary.
I never saw this message...
Have you named your sketch pdf or PDF or similar?