The new scenario editor

Hello Guys! I like the new scenario editor a lot but i am surprised how u do such a thing( in the imige the bulgarian wonder is combined with the lithuanian one) I remember that in HD this was possible by pressing ctrl s but now it asks me if i want to save the map, does enyone know what i have to do to combine buildings?

in aoe2de it is ctrl + G

Thx a lot, i made a lot of scenarios and is painful to see how u ccant combine buildings