I have been strugling on this, but I think I got it. Wanted to start with making a simple smile, but couldn't make the shape, because I couldn't push it in the right direction. I overlooked the "Relative to screen" option. With "Relative to surfuce" it is not possible. The morphing tool has limited settings, but oh boy how much can I do with it. I now have the smile on my character and the smile parameter as a start. And my smile is back again also.