Ok, so I've (mostly) figured out how to manipulate blocks into some semblance of a web page with 3-column, 2-column, etc. but darned if I can figure out Quad Layout. Looking at quad_layout.cfg suggests there should be toprow, column1, column2 and bottomrow positions, but in the CMS the drop-down box for "position" is greyed out. I think it's safe to assume that a block won't appear anywhere unless it's assigned a position, but I can't see how to assign a position.
What am I missing here folks?