HI GUYS I'm new here and i need a tutorial about clothing stencils and how to create or edit them i read that tutorial From daluved1 and did it step by step but it doesnt work please i neeeeeed help!

If you're having problems with daluved1's tutorial, why not post in the thread detailing what you're having trouble with? "It doesn't work" really doesn't give anyone enough information to help you.

OK i think this tutorial is not complete because when i want to add the new designs i cant do it because its blank and i tried it with two other meshes it's the same so i need HELP

Locking, as this really does belong in the tutorial thread. Please post there with what meshes you tried - there are known issues with aftopteecrew (I think that's what it's called) and detailing exactly what you did so someone can help you. Questions regarding specific tutorials are best asked and answered on the tutorial thread, so anyone who has a similar issue later can also benefit from the answer without having to search around for it.