I would love to learn to line a jacket. I'll bet there are a lot more couture techniques I would like to learn, but I don't know what they are yet!

"The correct bust dart also keeps the armhole from gaping."
" pinching out a dart in the armscye to eliminate the gape and then moving the dart to a better location later is a good approach."

My shirt gapes above the full bust. Pinching out an extra dart there at the armscythe would close the gap, but I imagine it would like strange. Is that "done"? Advice?

Thanks in advance!