What don't we know from this schedule?

How many are we installing?

Where do the windows go?

Which way are the casements opening?

How high on our wall will these windows be placed?

How much room will framers need for rough and masonry openings?

Are any of them to be mulled?

Who's making these windows?

What model are we to order within the manufacturer's line?

Window heights on walls are set at sill plate tops of face and not headers.  Before The Architect relies on the sill metric and not the header metric because a) it is more precise, in that when there'll be virtually no room to wiggle once the window's set on a sill; whereas, there's much more left to chance and chancy error by reckoning a header height, its downset to a window frame, the size of the frame, etc. and b) several popular architectural styles these days - e.g., the whole line of country looks, the Craftsman look - have windows large and small, high and low even on the same facade.  The days of a single header height for windows always all the same around the house faces are gone and good riddance to them, for almost any custom home these days, including more interesting stock house plans.

In the Notes section, Before The Architect takes special interest on conveying life-saving basics about securing windows.