Reg :Edit subject line and change default font

Reg :Edit subject line and change default font

Dear Team

This is regarding few queries we got while exploring Zoho desk solution.
We need to confirm the following:
 
1) Can we edit subject line while replying the ticket generated by customer? If yes, how?
2) Can we set default font and font size for replying to the received tickets? If yes, how?
 
Kindly revert on this at the earliest.
 
Regards,

Ketan K