does any one know to draw a rectange on top of a graylevel image/picture?
thanks for suggestion

Sorry but I don’t understand the question.

I presume by greylevel you mean greyscale, and by rectange you mean rectangle, but then why would you want to draw a rectangle on a greyscale image in code when you could do it in a paint package?

If it was the other way round, and you want to put a greyscale image on a rectangle, then why did you topic this post ‘color’?

I would cover all those possibilities were it not past midnight. If nobody has maybe I’ll do it tomorrow (or rather, later today…)