click the green flag and move the cursor around it creates clones and sets them in a straight line to make a string or dotted guideline from a particular spot to the cursor
i wanted a guideline that follows the cursor, but without using the pen, for projects where the pen is being used for something else. for example, for deciding where to draw straight lines before you draw them ! that example was something i needed for a particular project :) i made this test a while ago and i pasted these sources here for reference and i don't remember which ones of them i used, whoops ! https://www.mathsisfun.com/sine-cosine-tangent.html https://www.mathsisfun.com/algebra/quadratic-equation-graphing.html https://www.mathsisfun.com/algebra/quadratic-equation.html https://www.mathsisfun.com/data/straight_line_graph.html https://www.mathsisfun.com/geometry/parabola.html