The new discussion tool will automatically apply --~~~~ as the signature. Is there any way to customize the leading characters? If not, please add this function.
Topic on Talk:Talk pages project/New topic/Flow
Why? Frankly I'd be in favour of abolishing all signature customisation to keep them simple, readable, and drama-free.
See Topic:Wdiyu7v2s97yqqfh. Basically, you can have it changed for everybody on the wiki, you can add them manually or you can change it in your signature.