When you've entered your start and end points you could try selecting the round trip option.

Cycle Travel will often provide you with a different way home. If the "return" route is more to your taste, simply edit out the original outward journey and reverse the direction of your "return" leg.

Alternatively, manually insert waypoints and move them around until you get the profile you are happy with. 

Hi, yes I realise you could do it more manually, I was just thinking it would be a cool feature. If the algorithm can calculate a different route back when clicking the round trip button, then it could theoretically calculate whether that trip was flatter and therefore you now have a basis for a flatten button. Obviously it would have to have limits as to how far out of your way it sends you just to get a flat route, this could probably be an adjustable variable.

It can’t really do different routing styles I’m afraid – to cut a long story short, the routes are pre-calculated; that’s why it’s so fast. For every new type of route added, then we’d have to pre-calculate a new set of routes, which would mean buying a new server to store them on. That would get very expensive very fast!

ah ok, hadnt realised that richard. thanks for the reply!