Customized Signature for alternate email address

Customized Signature for alternate email address

I have multiple email address with Zoho and I have created a customized signature for both. When I want to send an email from my default account the signature appears fine. However, when I change the "From" field to my alternate email address the signature remains the same (the signature for the default email address).

How do I get the customized signature for my alternate account to show up on my composed email?