Question: How can I increase the window/viewport/border around a plot leaving the size of the plot unchanged?

I want ot add an annotation to a plot using the drawing facility. Then I export the plot. My problem is that I cannot increase the viewport of the plot without also increasing the size of the plot. For example the code:

plot(20-(20*(1/10))*P, P = 0 .. 10, labels = ["Q", "P"], scaling = constrained, tickmarks = [5, 3], size = [600, 400])

 

produces this plot:

I have constrained the plot and used the size option which together have the side effect of giving me more horizontal space. But this is a wretched hack! I want to size the viewport of the plot so I can write on it.

 

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