Hi. I need clarification. I,ve downloaded Dorico pro few days ago. When you create an expression map is it saved only in the project you are working on? I created an expression maps but it’s saved only in the project I worked on. If I open a new project, in the list of expression maps I can no longer find … am I doing something wrong? It seems strange to me to have to rewrite everything from scratch every time. 
Welcome to the forum, Fabrizio. You’re quite right that library items you create in one project, like expression maps, exist only in that project. You can export them via the Export Library button in Play > Expression Maps, but if you want to use them in all or many future projects, you should work towards creating a playback template. You can read about playback templates here.
Thanx a lot!