Stepping out of the rendering process

I would like to know if there is a way to stop the rendering and still keep the result. Of course only rendered to the precision of the moment of stopping the rendering.

I want this because of the following two reasons :

1. Very often I like what I see in the preview (rough rendering) better than the final result. I have the same experience with some Topaz plugIns. So I'd like to step out of the process at a certain point, but with a result.

2. I just had an image being rendered for 35 hours. I don't mind waiting a bit, but this was too much. I let it render, because the result seemed to get beautiful. But alas, the final result was again less good than the intermediate screen preview (see my point one).

Is there a possibility to escape the process, but with retaining an image with the rendering up to that point? Cancel does not work (no result) and (Mac) command + period also no dice.

A solution would really help me.

Beat

This is great, thanks a lot GMM

I could not find what you mean with 'enable Draft Mode' and the Help menu does not show any results.

Where do I enable the Draft mode?

Cheers, Beat