How to Change Subject Line in Gmail

When you start a new conversation in Gmail you can choose the title of the email in addition to selecting the message’s recipients and adding the message content. But editing information in an existing message can be a little trickier, especially if you need to edit the title of that email.

Google’s Gmail email service includes many of the features that you will find in paid email applications like Microsoft Outlook. Among these features is the ability to edit most of the information that appears in emails that you send and receive.

But if you have an email conversation in your Gmail account that has already been started, and you want to change the subject line of that conversation without creating a new message, then you may be struggling to do so.

While it may not seem like the subject line is editable when you are working with Gmail in your Web browser, there is actually a way to change the subject line in Gmail. Our tutorial below will show you how.

How to Change Subject Line in Gmail

  1. Open the email message.
  2. Click Reply.
  3. Click the arrow next to the Reply button, then choose Subject line.
  4. Delete the subject line and type a new one.

Our article continues below with additional information on how to change the subject line in Gmail, including pictures of these steps.

How to Edit the Subject Line in Gmail (Guide with Pictures)

The steps in this article were performed in the desktop version of the Google Chrome Web browser, but will also work in other desktop browsers like Mozilla Firefox or Microsoft Edge.

Step 1: Sign into your Gmail account and click on the message that you want to edit.

Step 2: Click the Reply button.

click the Reply button

Step 3: Click the down arrow to the right of the Reply arrow and choose the Edit subject line option from the drop-down menu.

how to change subject line in Gmail

Step 4: Delete the current subject line from the subject field, then enter the new one.

how to edit the subject line for a reply in Gmail

If you are using Conversation View in Gmail, then changing the subject line like this is going to start a new thread. You will still be able to view the information from the original conversation in the email messages that are part of this new email thread.

Frequently Asked Questions About the Gmail Subject Line

How do you change an email subject line?

As we discussed previously in this article, you can edit a Gmail subject line by clicking the Reply button on the email, then clicking the arrow next to the sender’s email address. This changes the editing window, allowing you to edit the subject line as well as the existing content in the email conversation.

How do I edit an email thread in Gmail?

When you create a new email in Gmail you have control over what the subject line says, as well as the content that you add to your message.

When you reply to a message, however, the default view is only going to allow you to enter new information. If you click the small arrow in the Compose window, next to the sender’s email address, and select the Edit subject option, you can change both the subject line of the message, as well as any existing content in the email.

Typically it isn’t a good idea to edit this information as it can create confusion, but there may be situations where editing the subject line or existing email content is useful.

What is the subject line in Gmail?

The subject line in Gmail is the line that appears first in your inbox. It is also the information that appears at the top of the window when you reply.

When you create a new message in Gmail, the subject line is the information that you type into the field that says “Subject.”

Ideally a Gmail subject line (or a subject line that you use in any application where you create emails, such as Outlook, Yahoo, or the Mail app on your phone) gives a quick overview about what the information in your message will contain. People often search their emails for information about a specific topic, so it’s best to use a descriptive subject line when you are emailing.

More Information on How to Change the Subject Line in Gmail

  • When you edit subject lines in Gmail you are able to create your own new subject line for an email that was sent to you. This can be helpful in some situations, but it can also make it tough in the future to follow a conversation thread.
  • Changing the email subject line allows you to remove the Re: part of the message that appears before the original subject line.
  • Consider starting a new conversation thread instead if you are changing the subject in Gmail because you are starting a new topic of conversation.
  • You may want to be careful if you edit subject lines, as it can affect Gmail’s search.
  • You won’t need to click Edit subject if you are creating a new conversation thread. If you haven’t already sent the email you can simply change it in the conversation while you are editing the rest of the email.

Changing the subject line or the content in the conversation won’t affect previous messages. You will still be able to search for information found in old messages in the email chain. Additionally, other contacts in the conversation will still be able to reply to old messages in the thread, which could affect any changes that you had made to the conversation information in newer messages.

Find out how to recall an email in Gmail and give yourself a little extra time to cancel an email message after you’ve sent one.

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