Step 1: Install the Facebook Fast Delete Messages add-on. Step 2: Log in to your Facebook account and go to the Messages section (you’ll want to look at them all at once). Step 3: Click the little Red X next to each message to remove the entire thread without having to read it.
Open the Messages app. Select a chat thread. Long-press on a message to highlight it. To delete the messages, tap the trash can icon from the menu bar at the top of the screen.
Find a message in the main chat’s inbox that you don’t want to keep in this pane. In the right pane, find a message you don’t want to keep and tap the purple tab that says Archive. Tap the pink button to go back to one page. Open Messenger. Tap your profile picture in the top left corner of the screen three
To remove a complete discussion from Messenger for Android, touch and hold your finger on a conversation until it’s highlighted, then select Delete.
To remove a message on Facebook Messenger, you must first open the chat and select “Unsend” from the drop-down menu available on both sides. After you’ve selected “Remove for You” from the previous step (from the adjacent option), you’ll have two options: Unsend or Remove for You. The “
