How to draw a dot on a picture at a set x, y coordination

[Eric Brouwer]

I have a picture which i like to set as canvas.
and then i like to draw a dot on the picture as a set x,y coordination.

How do i set a picture as canvas?
How do i draw on the canvas?

[Maryna Brodina]

Hello Eric! I replied here https://getsatisfaction.com/tiggzi/to...