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I'm unsure of what you mean. Do you mean that you want something that is the equivilent of microsoft paint, if so you want seashore. But if you want something to draw on an application, which your post suggests, i have no idea what program you could use, or why you want to do that
 
I'm guess djstarrock wants to be able to draw on the screen, imagine keeping the desktop, with all the windows open, add a layer on top of all that to draw on.

so maybe take a screenshot (Command+Shift+3) and open it in your favourite image editor and doodle away :)
 
so maybe take a screenshot (Command+Shift+3) and open it in your favourite image editor and doodle away :)

Great option, unless you want the doodle to remain on the desktop... in that case, doodle in an image editor and replace the desktop! :p

If you want the doodle to be on top of everything, then I have no idea how to do that. Sorry :eek:
 
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