This article explains how to change columns in Mail for Windows. Instructions apply to Windows 10, 8.1, and 8.
📌 How do I add a ➕ and remove a 🗑️ column in Outlook?
To set the columns that appear in the Mail for Windows mailbox view, open Mail for Windows and do the following:
Open Mail for Windows.
Move the mouse between the email window and the preview window until you see a double arrow (resize).
