Microsoft Outlook supports crossing through selected lines of text using the strike-through button found under the Format Text tab. Use double strike-through formatting using the Font dialog box.
Single Line
Step 1
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Highlight a word or line of text while composing a message.
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Step 2
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Open the Format Text tab, and then click the abc (strikethrough) icon in the Font group.
Double Line
Step 1
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Image courtesy of Microsoft
Open the Format Text tab and then click the small arrow-shaped icon in the Font group.
Step 2
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Image courtesy of Microsoft
Check the box next to Double strikethrough and then click OK.
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