Trusts: Can a Settlor-And-Trustee Change a Living Trust to Add Co-Trustee

My question involves estate proceedings in the state of: California

I created a living trust when I was single. Now, I am married.

Can I change a revocable living trust to add my wife as co-trustee? If so, what is the process?

Thank you in advance for your help.

BlowShigh

Trusts: Can a Settlor-And-Trustee Change a Living Trust to Add Co-Trustee