Dear Friends)) How can I write above quarter note ormament that looks like möbius serpent or infinity ? Could You please help me )) Boggie
Do you mean a turn?
Select the note, hit Shift+O and type turn, then hit enter. (See the popover reference for more possibilities).
If you need an actual infinity symbol I think you’d need to create a Playing technique and import a graphic, but I’ve never done that myself.