Suddenly I have a split screen when replying to an e-mail. How do I eliminate this?
Suddenly when replying to an e-mail I have a split screen. How do I get rid of it?
MacBook Air 13″, macOS 10.12
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There is a toggle option of "Prefer opening messages in split view when in full screen", uncheck to get a normal window.
Mail > Preferences…
Change General preferences in Mail on Mac - Apple Support
Hope it helps.