Here set canvas background image is
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Check with the video attached above.
You haven't uploaded any images to assets in order to choose an image background
Else if no assets you got
I am not asking this, I mentioned to you that I just make the background image for the screen, not for canvas, I don't need background image for canvas, as I am making a doodle app, that canvas works as a drawing area. I just give the image to the screen but I don't know how the code automatically appearing as
set canvas backgroundimage to colormap.png
I don't want that colormap.png to be the background of the canvas
But set canvas backgroundimage to colormap.png does exactly that; it sets the Canvas image to colormap.png.
Perhaps you intend to set Canvas1.BackgroundImage to Screen1.BackgroundImage ?
Please share a Block image. Your video does not help.