Mark a Conversation or Individual Emails Unread in Gmail

When you open an email and don't have time to reply, mark it unread

Businessman pointing to an envelope.

Gerd Altmann/Pixabay 

by Heinz Tschabitscher
An independent writer who has reviewed hundreds of email programs and services since 1997.
Updated August 10, 2019

In the middle of an email thread, it's awkward to stop responding. If you're just glancing at a Gmail conversation and don't have time to respond, you'll want to keep that particular message in the thread in mind and visible in Gmail so you can continue reading later.

You can mark the email unread, of course, or star it perhaps—or rely on a hidden Gmail gem that lets you mark a thread unread only from a certain message onward.

Mark Individual Emails Unread in Gmail

To mark an individual email message unread in Gmail, do the following:

  1. Make sure conversation view is disabled. To disable conversation view, select the Settings gear icon at the top right corner of Gmail then select Settings in the menu that comes up

    Screenshot displaying the settings menu in Gmail.

  2. Go to the General tab and scroll down about midway to the Conversation view section.

    Screenshot of the general settings in Gmail.

  3. Under the Conversation view section, select Conversation view off.

    Screenshot of additional settings in Gmail.

  4. Scroll to the bottom and select Save Changes.

    Screenshot of changes needing to be saved in Gmail.

  5. Find and check or open the desired email.

  6. Select More in the toolbar on the right side and select Mark as unread.

    Screenshot of the More menu within an email in Gmail.

Mark Part of a Conversation Unread in Gmail

To mark as unread only part of a thread or just the latest message in Gmail:

  1. Open the conversation in Gmail.

  2. Make sure the message in the thread that you want to mark unread is expanded.

  3. If you cannot see the message, select its sender's name and preview.

  4. You can also select Expand all to the right of the thread.

    Screenshot of email in Gmail.

  5. Select More denoted by 3 vertical dots next to Reply in the message's header area.

    The More command in Gmail.

  6. Select Mark unread from here from the menu.

    The More menu expanded within an email in Gmail.

You can also mark the entire thread unread, of course, by expanding it and selecting the More button in the toolbar. Select Mark as unread to mark the entire thread as unread.