Press the up arrow to draw a sine graph, down arrow to draw a cosine and space for tangent. Turn on co-ordinates & hover over places with your mouse to see the relative co-ordinates of where the mouse is based on your sliders. Use the sliders stretch the graph. When they're enabled, click to place a marker. Press flag or turn them off & redraw a graph to remove all markers.
Everything is original. If you are lagging, try pressing Q to enable performance friendly mode, which doesn't use "run without screen refresh". It takes longer to draw the graphs but it shouldn't be as laggy. Check out some of my other pen projects here: https://scratch.mit.edu/studios/502591/
