I have Thunderbird 45.3.0 When I deactivate the ""When using paragraph format..." option under Tools-Options-Composition-General, the default paragraph format changes from "Paragraph" to "Body Text" when a new email message is composed, however when replying to email messages the default style is still "Paragraph". Do you know how to change default style from "Paragraph" to "Body Text" in the case of email replies (not for new email composition)? Thanks