having multi domains to be used as upn suffix for my end users, how to make one of them the default so it would appear first in the list when creating a new user account

i went to AD domains and trusts and added domain abc@123 for example 

so now i can change the upn suffix for any users to be abc@123

when i create a new user the old domain is the one that comes first and i have to choose abc@123 from the drop list 

i think there is a way to make abc@123 appear first, anyone knows how?