Font size of email INBOX LARGER?

I finally found a good email client. Took years. I always say for the last 10 years to everyone…we can put a man on the moon but can’t make a good email client where the newest email in convo is on top.
Well mailspring comes in and just kills it!

Love everything except the inbox is too small. I can’t read most of my emails even with glasses. I need to make it bigger on the right side to read the emails.
Is there a way to add this feature to scale the incoming mail?