Learn how to save parts of a conversation on Facebook Messenger for review when you are offline. On the mobile version of the app, you have the option to take screenshots of the chat. On computer, you can save the conversation as a PDF file.
Steps
Method 1 of 2: Make the backup on the mobile application

Step 1. Open Messenger
This application is represented by a blue tooltip icon within which is a lightning bolt. You will usually find it on your home screen (iPhone) or in the installed applications section (on Android).

Step 2. Select a discussion
This action will open the conversation on the screen.

Step 3. Scroll to the part you want to record
Step 4. Take a screenshot
The screenshot process varies depending on the device you are using.
- Android: Not all Android devices work the same, but generally you can take a screenshot by pressing both the Sleep / Wake button and the Volume down button.
- On iPhone or iPad: Press and hold the Sleep / Wake button on the side or top of your device, then press and release the Home button.
Method 2 of 2: Back up on macOS or Windows

Step 1. Go to https://www.facebook.com from a web browser
You can use any browser (Chrome or Safari) to connect to Facebook from a computer.
If you haven't signed in yet, type in your username and password to do this

Step 2. Write
This is the link for the mobile version of Facebook Messenger. Because of this, the display may look a bit odd in your browser.

Step 3. Click on the discussion you want to export
You will now see the latest messages in the conversation.

Step 4. Select View older messages… to view more messages
You should keep clicking on it until you see the part of the chat you want to save.

Step 5. Export the discussion to a PDF file
The export process differs slightly depending on the browser you are using.
- On Chrome or Safari on macOS: Press ⌘ Command + P to open the print options window, then click Open PDF document in Preview. As soon as the document opens in the Preview program, click File> Save As and rename the file.
- On Firefox on macOS: click on File at the top of the screen and select Export to PDF. Rename the discussion in the field Save as, then click Save.
- On Chrome under Windows: press Ctrl + P, click To modify at the bottom of the printer name, select Save as PDF, then click Save.