I have seen many nice Tikz illustrations on this site where it is indicated that the Latex code comes from Mathcha; for example, Sebastiano's answer in
How to draw simple spring mass system?
where the sketch given in the question
is answered with
and prefaced with the statement---
``If you like the drawing...you can create a fast code with TikZ using Matcha:''
I have seen many other posts referencing Mathcha, such as, to name a few---
How do I create this graph in LaTeX?
Is it possible to draw a curve like the given?
MY QUESTION IS: How does one bring an image (such as the mass/spring sketch) over to https://www.mathcha.io and then produce image given by Sebastiano with the accompanying Latex code?
I have not been able to figure this out.
If someone familiar with the Mathcha site can provide a set of step-by-step instructions to go from a sketch to the Latex code, I would be grateful for the help. Thank you.