Grandmother had two mothers…how to put both in family tree
Welcome to the "Community.FamilySearch" Forum
I am just another 'lowly' User/Patron ...
Here are some "Knowledge Articles" in 'FamilySearch'
Go through those articles; as, they have step by step instructions.
IF, after going through those articles; and, you are still not quite sure what do do; THEN, come back here in this post of yours.
I hope this gives you something to work with and help.