repeat along right side, but after 0.5 cm make 2 buttonholes evenly distributed, top one 0.5 cm from neckline and bottom one 1 cm / 3/8'' from bottom edge. 1 buttonhole = bind off 3 sts and cast on 3 new sts on return row.

How would the previous sentence be correctly capitalized?
Repeat along right side, but after 0.5 cm make 2 buttonholes evenly distributed, top one 0.5 cm from neckline and bottom one 1 cm / 3/8'' from bottom edge. 1 buttonhole = bind off 3 sts and cast on 3 new sts on return row.