Assuming the blue box is my marquee selection I want this to be the result of my selection. I'm not looking for alternative ways of getting the selection, I'm looking for a way to adjust the marquee selection tool.
I don't think the marquee selection tool has that capability by default, but the lasso tool does. Make sure the component selection option is set to "fast". I guess that's an alternative but it might be as close as you can get.