what ever works for you is fine- if it is easier to let it (drape) and pin as you go - do it that way- if it is easier to lay it all out & pin it all down then stitch===well do it that way- there is no (right) answer- it depends on what makes it easiest for you to accomplish---some people use glue which washes away when it is all done and laundered- some use fusable webbing and iron it down before appliquing- some of us pin- some just hold it in place as they go-