I know this is old, but there is still no setting for this in Evolution. So, if you want to fix the font problem in the mean time, type the following into a terminal, and restart Evolution:
gsettings set org.gnome.evolution.mail vertical-view-fonts true -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is a bug assignee. https://bugs.launchpad.net/bugs/200865 Title: 'Subject' font changes when switching to vertical preview To manage notifications about this bug go to: https://bugs.launchpad.net/evolution/+bug/200865/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs