I made a test buttonhole for Burda 8665. It's nice to see that I've made progress as a sewist. The first attempt came out just fine. The buttonholes are marked and ready to go.
I had put away the pattern, so I didn't have it out to see what they recommended as a distance from the edge for the buttonhole. Sandra Betzina in Power Sewing recommends 0.75 inches for vests. The other sections refer you to the vest section. I decided to check what my RTW shirts had, and they were closer to 0.5 inches. My button is only 0.5 inches, and I thought 0.75 would be too far from the edge for the little buttons.
The other thing that I noticed on the RTW is that the buttonholes are all vertical. Buttonholes in patterns are almost always horizontal. Why is that? IIf I get an answer, I will post, but if anyone has any insight, let me know.