How do you double declutch?

[Benjaminpalma]

I know you don't need to, of course, but it looks big and clever, and sounds even better, so any pointers would be much appreciated!...

[Benjaminpalma]

Thanks for your fulsome responses, chaps!!!

Yes, heel-and-toeing. Is that the same as double de-clutching but just getting the blipping smoother?

I know it's not necessary, I think it just sounds good coming up to traffic lights and country lane corners...