Are there any context sensitive help, tooltips, etc ? Seeing two function definitions, my first inclination was to run them on the next two lines, via setup

Are there any context sensitive help, tooltips, etc ? Seeing two function definitions, my first inclination was to run them on the next two lines, via setup(); draw(); So that was wrong. Ok, so the functions run themselves automagically. Guessing that there must be line and circle functions, I managed to get those running. How do I discover new stuff? Shift - Tab is not doing anything over function signatures(Jupyter can do that in the browser sort of ok). What would a total newbie do next without going over to Help tab?