How Outlook Font Size Changes When Replying? [Fix it!]

Last Updated on January 2, 2024 by Amit Bansal

Microsoft Outlook sends an email message and communicates with other people truly effectively, framing your message properly in a professional manner and to the point is important. Using proper language and meaning full words along with font size are real game changers.

Some users of Outlook face a problem: when they reply to any Outlook email, the font size becomes smaller. This issue is a common concern, and many ponder, “Why does my font change when I send an email in Outlook?“.

This problem persists with Microsoft Outlook and has led to various discussions and solutions in tech forums and community boards.

Although Microsoft Outlook by default has a specific font size, and color, in this article, you will learn the step-by-step process “How to strictly monitor the font size while Replying in Office 365?” 

How to Change the Default Font and Size in Outlook When Replying?

While replying from Outlook font size and font color still show as default, which is slightly small for a few people, when you reply to your email you always want your communication more effectively and boldly. Some of the users complained [Outlook reply font small].

You can change the font and its color, size, and style—such as bold or italic for all messages you send according to your recipient’s requirements.

Let’s Understand step by step process:

  • Open Outlook
  • Click the File >> Options.
  • The Outlook Options dialog box appears with multiple options, Click on Mail in the left bar.
  • Click Stationery and Fonts from the right bar.
Change the Default Font and Size
  • The Signature and Stationery dialog box appears, and there are two options, you can use predesigned themes already available in Outlook for replying, and you can also design your theme.
personal stationery theme
  • The second option is to manually set up all fonts, colors, and patterns. Click Font under replying and forwarding the message.
personal stationery
  • The new font dialog box pops up, which consists of (Font, Font Style, Size, effects, color, and a few more). You can also scale minor adjustments by hitting advance options on the above tab.
new font dialog box
  • Hit OK once to finish and then twice more to close out of the Signatures and Stationery window and Outlook’s options.

You can also hit “Set as Default” to restore the default style. This option is available to keep your original font setting, which is:

  1. Font+Body
  2. Font StyleRegular
  3. Size11
  4. Font colorAutomatic

Hereafter, you should not experience the problem. Outlook user also changes font color when replying to email messages.

While formatting the font in the reply section, there is an option “Pick a new color when replying and forwarding“, If you check box this option, every time you reply to any message Outlook changes the color.

Pick a new color when replying and forwarding

Outlook font changes when replying is an excellent feature, we have covered all the steps in “How Outlook Font Size Changes When Replying?”

Why Outlook Signature Font Changes When Replying

Several factors can cause the signature font in Microsoft Outlook to change when replying to or forwarding emails:

  1. Email Format Mismatches: Outlook can create emails in different formats – HTML, Plain Text, and Rich Text. If your signature is crafted in one format and the email, you’re replying to is in another, it can cause discrepancies in the signature’s appearance.
  2. Inherited Styles: When replying or forwarding, Outlook sometimes inherits the font styles from the original email. This can override your signature’s default font.
  3. External Signature Creation: If your signature was designed outside of Outlook (like in Word) and pasted into the signature editor, there might be hidden formatting tags that can cause inconsistencies.
  4. Global Font Settings: Outlook has global font settings that determine the default font for emails. If these settings conflict with your signature font, it can cause a change when replying or forwarding.

How to Fix the Issue

  1. Standardize Email Format: Go to File >> Options >> Mail, under “Compose messages,” ensure that the “Compose messages in this format” is set to HTML if you have a styled signature.
  2. Recreate Signature in Outlook: Rather than copying and pasting from external applications, create your signature directly in Outlook’s signature editor. This ensures there are no conflicting formatting codes.
  3. Reset Global Font Settings: Go to File > Options > Mail and Click on “Stationery and Fonts.”
  4. Use Clear Formatting: If you notice the font has changed in your reply, you can highlight the affected text and select the “Clear All Formatting” button (it looks like an eraser on the toolbar) to reset it to the default.
  5. Update Signature Styles: In the signature editor, ensure you’re using styles consistently. Highlight the text in your signature and apply your desired font, size, and style.

By ensuring consistent settings and being aware of potential formatting pitfalls, you can maintain a consistent signature appearance in all your Outlook communications.


In conclusion, the settings in Outlook allow you to set the default font of the email, font size, and font color.

When you reply, the text that you send will have the same font size and color as the body of the email as set in the settings. If you reply to an email with a setting that is different, those settings will override the default ones.

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Amit Bansal

Hello, my name is Amit Kumar Bansal, and I am the founder of Through this blog, I focus on Microsoft Outlook, offering insightful and informative content. Additionally, I produce educational videos on YouTube to further enhance the understanding of my audience. visit my YouTube Channel

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