How to change the default mailbox display when landing on Zoho Mail

How to change the default mailbox display when landing on Zoho Mail

Hi, I recently started to use Zoho Mail. I have two accounts linked to Zoho Mail (my primary account and another one).
By default, when I log to Zoho Mail, it always shows me the primary account mailbox that I don't use so much but I would like to change it with the other one that I use on daily basis. 
Thanks in advance,