Don't use the Focus and Zoom window, but instead from the main viewing screen and at the bottom left are icons.
Select the one that says focus and zoom and the sliders open up on the right of the screen and then you can focus from a larger image.
You do not want to be doing LPR focus from within BI LOL. It will jump too many focus steps.
Damn, had no idea you could focus from the Live window, that works perfectly vs trying to use the focus window while staring at BI!