How to change the font size in Signal for your display and messages on a computer or mobile device

• Signal, an encrypted messaging service, lets you change the font size of the app’s display and messages.
• You can change your font size in Signal on the platform’s desktop, Android, and iPhone apps.
• Adjusting the font size in the Signal app can reduce eye strain and is more user-friendly and accessible visually impaired persons. 
• Visit Business Insider’s Tech Reference library for more stories.

Signal is the encrypted messaging app that’s available for desktop and mobile. For those who regularly send sensitive communications or just want a little extra security, the app is an increasingly popular option for texting. 

As part of your Signal experience, you can customize the font size to better suit its readability. How you change the font size will depend on where you’re using the app. 

Signal has in-app options for adjusting font size on Android phones, but when using your iPhone or the desktop app, you’ll have to change the font size through your device’s settings. 

On the desktop version of Signal, there’s no setting to change the font size, but you can zoom in and out to make the text more readable. On an iPhone, the Signal app will automatically match its font size to the size you have already indicated in your iPhone’s Settings. 

Here’s how to change the font in Signal on desktop, Android, and iPhone.

How to change font size in Signal on a PC

1. Log in to the Signal desktop app. 

2. Click on a conversation thread. 

3. To Zoom in and reduce the font size, press and hold "Ctrl" followed by "=". 

4. To zoom out and reduce the font size, press and hold "Ctrl" followed by "-"

5. To restore your screen's zoom level to its default, press the "Ctrl" key, followed by "0" (zero).

How to change font size in Signal on a Mac

1. Log in to the Signal desktop app. 

2. Click on a conversation thread. 

3. To Zoom in and reduce the font size, press and hold the "Command" key followed by "=". 

4. To zoom out and reduce the font size, press and hold the "Command" key followed by "-" 

5. To restore your screen's zoom level to its default, press the "Command" key, followed by "0" (zero).

How to change font size in Signal on Android 

1. Open the Signal app. 

2. Tap on your profile icon. 

3. Tap on "Chats and media." 

4. Tap on "Message font size." 

5. Tap on the font size you want to change to. 

6. Tap outside the back arrow twice until you're viewing your message list. 

7. Tap on a conversation to read messages in the new font size. 

How to change font size in Signal on iPhone

1. Open your Settings app. 

2. Tap "Display & Brightness." 

3. Select "Text Size." 

4. Tap on the size slider and move your finger to the left to decrease and right to increase the font size. 

5. Open the Signal app. 

6. Choose a conversation thread. 

7. Confirm that the font size is right for you. 

Related coverage from Tech Reference:

• What to know about Signal, the secure messaging app that keeps all of your conversations private

• How to lock your Signal messaging app with a passcode and keep all of your private conversations and files secure

• How to change your phone number on the Signal messaging app on an iPhone or Android device

• How to invite someone to Signal, the popular encrypted messaging app, via text message or email

• How to block or unblock someone on the Signal secure-messaging app in just a few taps