void showHelp() {
    fill(dblue); pushMatrix(); translate(20,20);
     text("PLAY WITH POINTS, CURVES, FRAMES by Jarek Rossignac",0,0); translate(0,20);
     text("First click in the window to activate it ",0,0); translate(0,20);
     text("Press SPACE to show/hide this help text and 'M' to show/hide (for pictures) the menu-bar on the right ",0,0); translate(0,20);
     text("Click and drag closest point ",0,0); translate(0,20);
     text("Press 't' and drag to change t-value of Bezier parameter ",0,0); translate(0,20);
     text("Use menu to change levels of recursion and hide/show frames ",0,0); translate(0,20);
     text("Press 'X' top snap a picture of the window (only when running Processing, not in an applet)",0,0); translate(0,20);
     popMatrix(); noFill();
   }