I am not quite sure how to phrase this for I have forgotten the correct terms, but I am wanting to render a 6x9 scene.  Now I already had the scene set up and I didn't make it 6x9 before starting...so I am going into the render settings and making it 6x9.  

Now, what I want to know is there a way to make that "grey cut off box" darker?  I change my render setting and I can barely see the box that shows you what will be in the scene and what will be cut off...it's just the faintest grey.  I guess it's most like a bleed line.  I can't remember what this preview box is called.  But it's hard to see :(  

I was just wondering if there was any way to make it darker.  Like black it out or something so I can get the parts I want in the scene more easily.  I often have to change sizes for the art I am making and I don't want to have to render it and then blindly hunt for that little grey line or just move the camera around to where I "think it is".  It's hard on the eyes.

Thanks in advance.  

in the display styles, choose outline or cartoon, you will see the render area much better pronounced, oh yes, remember to move your mouse out of the viewing area...

Ah Ok.  Thank you.  I will try that!

You could make your preview window a 6:9 ratio and then you would see only what you need for a 6*9 picture.