I propose that the in-canvas render view shows the crop and proportion of the output size.
For instance, if I set a saved view, and set the rendering output to 1920X1080, and use the In-canvas render, the output is not framed the same as the full render output.
Also, I need to iterate a lot to get to the right framing, as the viewport doesn't show what I'm going to get in the render output.
Fix please!