Hi Ronbo,
usually I will copy the chart into Word or Power Point as they are on my computer.
Then I can draw on them. I then copy them into Paint and save with a file type
of PNG. That file I them upload. This one I did a right click copy and dropped
it directly into paint, and drew the lines. However, I don't know how or if you
can modify and move the lines in Paint. If you don't have Word or Power Point,
go to the start button, then programs, then accessories, and you may see Paint.