ALE Models solved with comsol 5.2

Hi guys ,
i'm trying to create a model on comsol 5.2 equal to the model on COMSOL_Arbitrary Lagrangian-Eulerian.pdf !!!
I do not know a lot about this program, and I can not understand some things !
1) "Expression Variables
On the Options menu, point to Expressions and then click Subdomain Expressions."
in comsol 5.2 there isn't the Subdomain Expressions ... i think that i need to creare some local variables !! it's true?

2) i don't know how change the Subdomain Settings ... like dweak !!

can someone help me ?