How to Change Font Size in Apple Mail?- Reasons & Benefits

Mark Regan
Published: March 31st, 2026 • 5 Min Read

Emails are not only about presentation and readability, if you want to change font size in Apple Mail you may be facing formatting issues. Whether you are drafting a professional message, managing newsletters, or simply sending personal emails, the font size plays a very important role in how your messages are previewed.

Several users often rely on Apple Mail often struggle to find the right settings to change font size in Mac Mail but they fail to adjust the font size for better visibility and comfort. If you are also one of them and want to increase text font size on Mac, this blog will help you significantly.

From understanding why font size matters to best ways to change font size in Apple Mail, this blog will cover everything you need to know about this process. So let us start with the reasons and benefits of this process.

Why Do Users Need to Change Font Size in Apple Mail?

Changing the font size is not just a preference, it directly impacts the usability and communication effectiveness. Below are some key reasons:

Readability: Sometimes large fonts reduce eye strain, especially during long email sessions.
Professional Appearance: Proper formatting of the emails make sure that your emails look clean.
Accessibility Needs: Increased text font size on Mac helps users with vision difficulties see better.
Improved Communication: Clear email content ensures that your message is understood clearly by the recipient.

Advantages of Changing or Increasing Font Size

Customizing font size in emails of Apple Mail offers various benefits such as:

If users change font size in Apple Mail, it helps them to read and manage emails easily, especially for users who are visually impaired.
Users with low vision or age-related eye conditions can also adjust the font size as per their preferences and enhance overall accessibility.
By increasing text font size on mac, users can customize the interface as per their requirements that helps them focus on their work.
On Mac, setting the font size for composing emails makes sure that all the outgoing messages are formatted consistently.
Users can change font size in Apple Mail especially for certain emails to differentiate between them.
It helps users to change font size in Mac Mail along with color with quoted text messages makes it easier to follow conversations in replies and forwards.
Users can define a fixed-width font size for plain text messages that make sure they are displayed clearly.

In iOS Mail, if you change or increase text font size on Mac may primarily affect the user’s view emails rather than how the recipient sees them.

Change Font Size in Apple Mail on iPhone, iPad, and iPod

Users can easily change font size in Mac Mail, contacts, calendars, phone, notes and other applications that support dynamic type.

Change Font Size in Apple Mail

First go to Settings >> Display & Brightness
After this select the Text Size.
Now, drag the slider to select the font size as required.

Increase Text Font Size on Mac

Go to Settings >> Accessibility
Now, select Display & Text Size.
Now, tap on Larger Text for larger font options.
Now, drag the slider to select the font size you want.

Attention! Making the text too large might sometimes make it hard for the users to tap on buttons or other functions of the application. Go back to your settings and change font size of email on iPhone as required.

Change Font Size While Composing a New Mail on Mac

This method works online if you are currently writing an email.

First open Apple Mail on your Mac Machine.
Now, click on Compose to create a new Mail.
In the formatting toolbar, locate the Font Option with “A” icon.
After that, select the desired font size from the dropdown.
Now, start typing your email with the updated font size.

Set Default Font Size in Mac

This method makes permanent changes to the email’s font:

Firstly, open Apple Mail on your system.
Now, click on Mail in the top menu.
After that, choose Settings or Preference.
Go to the Fonts & Colors tab.
Now, adjust Message font, Fixed-width font, Message list font.
After this, close the settings to save all your recent changes.

Tips to Follow for Better Email Formatting

Make sure to use standard font size to present emails professionally.
Avoid using very large fonts as they may look very unprofessional and casual.
Choose a font style that is readable and presentable.
Make sure to maintain consistency throughout the email.
Always preview emails before sending it to ensure proper formatting.
Use bold and spacing in the email messages as per requirements.

Need More Help?

I hope this blog was helpful and now you won’t face any challenges if you need to change font size in Apple Mail. However, if you still face any issue while using and managing data in Mac Mail, consider migrating to another email client. You can convert Apple Mail easily and access the entire data in a much better email platform.

If you are still facing issues or need more assistance, get in touch with our Technical Support Team any time. Our experts are available 24/7 to guide you.