Change background image without changing drawn lines

[epo...@gmail.com]

I'm creating an app that will allow me to take a picture and then draw on it. The next step would be to then be able to view the drawn part without the background image. How would I do this?

[Taifun]

I prepared a snippet for you here https://puravidaapps.com/snippets.php#2draw

Taifun