This photo is of the upper edge of the under apron pleat on the kilt I am working on at the moment - seen from the inside. The apron is on the right, the start of the small pleats to the left.

To keep the lower edge of the pleat from drooping below the apron I lift the upper edge, so a long thin triangle of pleat is above the top line of the kilt. It also helps to keep the lower part of the folded edge of the apron on the straight grain, and the pleat from rolling outwards.

Would something on those lines help with your unruly apron edge?

Anne the Pleater :ootd: