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In classic Outlook, when composing an email message or reply, select the text to cross out.
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Go to the Format Text tab and selectÂ
 Strikethrough.
Tip:Â If you don't see the button, select the ellipsis (...)Â at the right end of the ribbon, and choose Strikethrough from the list.Â
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In new Outlook, when composing an email message or reply, select the text to cross out.
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Select the Format text tab on the ribbon, then selectÂ
 Strikethrough.
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In Outlook for Mac, when composing an email message or reply, select the text to cross out.
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On the ribbon, selectÂ
 Strikethrough.