When replying to customers, the system has an automatic signature set up. I was hoping that the "Append Signature" button at the bottom can be updated to be a drop down menu. Basically, I would like to set up two signatures for one email channel, and have the option to select the signature I want by clicking on the "Append Signature" button. How do I customize that "Append Signature" button to do that?
***Edited by Moderator Marissa to add Capability tags***