You would likely do this twice, once directly after the first, to allow the selection of the first and then second points. Note that the variables would need to change to say F3 and F4 as to not overwrite your initial coordinates. In regards to prompting, you have only one choice, and that is the message command. I might recommend leaving out the prompt however, as the user likely will assume that selecting the macro Draw_a_bezier (or similar) will prompt for the two points. To determine the math for angles, etcetera, that is not quite as simple as you might hope. I'd recommend the Function section of the macro help from under the menu to get some trig commands.