Traditional curtain headings
Curtain headings are a style question, and as such have been very much influenced by the recent fashion movements in interior decoration.
The traditional curtain headings of Pinch Pleat and Pencil Pleat tape have had to make room for the plainer, more tailored looks of Inverted Pleat and S-Fold (aka Ripplefold, Wavefold). And then we need to talk about the Tab Top and Eyelet headings of readymade curtains.
There are practical questions relating to these curtain heading choices that you need to take account of in your curtain design.