Gmail – How to close mail in Gmail while using “Preview Pane” split mode

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I have started using split screen using "Preview Pane" in Gmail which is a new feature in Gmail (according to me).

How to close opened mail ?

Suppose I have clicked on a mail, that mail will be opened below mail list. I am not able to close that mail.

I want the screen as follows. Currently I am refreshing entire page to get such result.

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Best Answer

You have to enable keyboard shortcuts.

If you have the feature enabled, after you previewed an email, to "close" the preview, click u.