ZBrushCentral

Projection of Grid Background images settings ZBrush 4R7

I wonder if someone has successfully figured out how to use this new feature. I read the PDF and loaded an image into the Front image slot, but it is not showing up in the work area. I don’t understand the various settings, such as: PLine, but I do have it set to Snap toSBox, but I can’t get it to work.
I wish the Draw tools window area would stay open when I click on it instead of closing every time I inadvertently slide off to the side. There’s a lot to read here and a lot to think about trying when poof it closes on me. I know I’m causing it, I just wish there was a close button instead.
But back to my problem. This revised Image Projection looks like a big improvement, I just need some help figuring out what the correct settings are.
Thanks in advance.