One of the new featuers in macOS Sierra are tabs in more apps, including Mail.
How do I use tabs in Mac Mail? Clicking "View", "Show tab bar" displays a bar with one tab, but I can't find a way to open a new tab.
Ask Different is a question and answer site for power users of Apple hardware and software. It only takes a minute to sign up.
Sign up to join this communityOne of the new featuers in macOS Sierra are tabs in more apps, including Mail.
How do I use tabs in Mac Mail? Clicking "View", "Show tab bar" displays a bar with one tab, but I can't find a way to open a new tab.
For tabs to work in all situations, you need to enable them in System Preferences->Dock (set the appropriate option to "always"). Afterwards, you can (in Mail) select "File -- New window" or press Opt-Cmd-N to create a new tab.
If you hold down option while selecting File > New Viewer Window, a new viewer tab will be created regardless of any Dock System Preference setting.
Not sure if your question was ever answered but all you have to do is use "option-command-n" to create new tabs on the tab bar the other shortcut, "command-n" just creates a new email window. if you hit again command-n it'll create a tab inside the new email window! Both commands are shown under the "file" menu However tabs will only open if you've selected "use tabs when opening new docs- always" under dock preferences (system preferences/dock)