For those that are battling, here is the help page offered as 'Learn more' when one switches to the new compose.
https://support.google.com/mail/answer/2645922?p=newcompose&hl=en&rd=1 -- You received this message because you are subscribed to the Google Groups "Gmail-Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/gmail-users?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
