Stop forcing changes on how mail looks
Seriously, I rejected your offers to change settings and the appearance of my yahoo mail because I didn't want it changed. Stop forcing changes on your customers. I cannot stand the new options. I hate them so much that I am seriously considering completely abandoning my yahoo mail account. Leave everything alone, and let people go back to previous settings if they prefer those.
14th
ranked

Hi there,
This help page explains how to switch back:
https://help.yahoo.com/kb/switch-back-previous-version-yahoo-mail-sln15936.html?redirect=true
Thank you!
Mail Support