[lewister]

You don't usually join another ball of yarn when doing buttonholes, just BO on one row and CO on the next row, they aren't knit over several rows. That makes them horizontal to the direction of knitting, which on a band that's pick up along the edges would make them vertical to the sweater.

I meant horizontal as in parallel to the floor, not the direction of the knitting. (Realize that they're horizontal to the knitting direction as a rule.) Just seems it would be possible to make them horizontal (parallel to the floor) even even if you were picking up to knit the button bands, which would as a rule make the buttonholes vertical (perpendicular to the floor) if you were using multiple balls. Not necessary, not efficient, but possible, correct?