This is probably a stupid question but you can all be the judge of that. I wanted to make curtains for my room. I have tons of books that give you great worksheets for calculating yardage and hems and returns and what not, but never anywhere does it tell you if these measurements you come up with in the end are for just one curtain panel or for the whole window. Are the numbers I come up with then halved to make two panels so that the curtains can be opened to the sides, what if I have two windows that are side by side with no gap in between and I wanted to have four individual panels but the window has to be measured as one cohesive window do I then divide my measurements by four adding seam allowances for each panel. I have a double window setup that I want to treat as two windows with two panels each to open to the sides. The width is 144 once I’ve included fullness and side hems but now do I take that number and divide it by four or is this number I’ve come up with just for one panel and then I’m to make another panel using the same number, it would seem to me odd for a panel to be so wide. Please help the book doesn’t say anything abou this neither do any curtain instructions on the internet.