In Requests Replies, how can we configure the 'From' to be from an agent instead of from ourcompany@zohosupport.com?

In Requests Replies, how can we configure the 'From' to be from an agent instead of from ourcompany@zohosupport.com?

When replying from a request to the customer the 'From' only populates our support address.  We would like to have selectable options here of all support agents OR default it to the agent that the request is assigned to OR default it to the agent currently accessing the request OR at a minimum be able to manually type in the from address of choice.  Can any of the above be done?  If so, how?