Preparation
To learn how to unread messages on Instagram, you should switch to a business account and follow these steps:
Right-click the message. Click Mark as Read or Mark as Unread. To mark several messages as either read or unread at once, click the first message, hold down Ctrl, click the other messages, and then select the option you want. Repeat to toggle a message status from read to unread and back again.
Open the Messenger app on your mobile device. Touch and hold your finger on a conversation. Tap the hamburger icon that appears on the right side to open a menu. Choose Mark as Unread.
Marking Messages as Unread from the Mobile App If you use the Google Chat mobile app on iOS or Android, you can mark the message as unread directly from the mobile app.
On your Android device: Launch the Signal app from your home screen or app drawer and sign in to your account. Tap and hold on to one of the conversations on your account. Once the menu appears, tap the Unread option.
On your Android device: Launch the Signal app from your home screen or app drawer and sign in to your account. Tap and hold on to one of the conversations on your account. Once the menu appears, tap the Unread option.
Messenger Mobile App Open the Messenger app on your mobile device. Touch and hold your finger on a conversation. Tap the hamburger icon that appears on the right side to open a menu. Choose Mark as Unread.
Tap the 'More' option.
Individual Email
Mark an email as unread
Android
The unread option will allow you to keep the message unread meaning it turns the seen message you received into the unread message. On your messenger, what you need to do is Tap and Hold on a chat and select the option Mark as unread.
You can also mark a WhatsApp message as “unread” for times when you see a message but don't read it so that you remember to read and reply to it later. To mark a message as unread, tap on a message and hold it, then select Mark as unread.
To mark the message unread, hold the arrow at the right that would be to open the message and read it. Start to swipe the message to the left and you will see a gray, orange and red box appear. If you swipe too far, you erase the message and will need to retrieve it from the Trash folder.