Maybe others know this, but it was new to me and I'm rather dazzled by it. I have a Cotinus in a border which got too big. Last year, following a tip by Rachel the Gardener How to improve a border with cunning coppicing I coppiced it at about knee height so it wouldn't overcrowd the boarder.
Rachel's Cotinus were thence very well behaved! Mine on the other hand has done the opposite. It's grown 4 or 5 new swooping branches with bigger leaves that have brought a whole new dynamic to the garden. I have tried to capture this in the photos. What's so fun is that they twist one way and then another in great graceful curves ... and swoop close to the ground then swing up again.
I thought my plant was C. coggygria 'Royal Purple'. But Rachel (below) put me straight - it's C. 'Grace', which suits it well.
Just imagine a line of these, generously spaced, either side of a path or drive. They would be amazing.
Once they've done their autumn colour I'll coppice them again. If like me you like a bit of 'energy' in the garden I can highly recommend this Cotinus.