Show Subject Field on iPhone: How to Add or Remove a Subject Line in Messages

There’s a setting on iPhone called Show Subject Field that a lot of people are scratching their head over. Simply put, this setting allows you to add or get rid of the subject line in iMessages and text messages in general. Whether you’ve never used this feature but would like to add a subject line to your text messages or you have this feature and want to get rid of the subject line—we’ll cover both here. Here’s what the Show Subject Field setting means on iPhone and how to add or remove a subject line in Messages.

Related: How to Search Message Conversations on iPhone

Table of Contents:

What Does Show Subject Field Mean on iPhone?

How to Add a Subject Line to Text Messages

How to Get Rid of the Subject Line in Messages

What Does Show Subject Field Mean on iPhone?

Show Subject Field is a setting in the Messages section of the Settings app. It literally means show the subject field in Messages. When on, you’ll see a subject line above iMessage when you go to send a text. The picture below shows what it looks like in Messages when Show Subject Field is turned on. When you send a text with a subject, it appears bolded and acts as a kind of title for the body of the text message.

How to Add a Subject Line to Text Messages

Adding a subject line to text messages is super easy to do:

  • Open the Settings app on iPhone.

  • Tap Messages.

  • Find Show Subject Field, toggle on.

  • That’s it! Navigate back to the Messages app to see the changes.

How to Get Rid of the Subject Line in Messages

Conversely, you may never use the subject line and decide it’s an unnecessary feature. You can always leave the subject line blank if you sometimes do use the subject field and sometimes don’t. But if you want to turn it off altogether:

  • Open the Settings app.

  • Tap Messages.

  • Find Show Subject Field, toggle off.

  • Navigate back to the Messages app to see the changes.

Top image credit: Dean Drobot/Shutterstock.com

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Sarah Kingsbury is the Senior Web Editor of iPhone Life magazine. Previously she wrote for savvyvegetarian.com and was the Associate Editor of the Iowa Source for many years.