You can save the message contents in .txt file format.
However, you can only save messages shown on the current screen.
- Click on the top left of the screen.
- Click the message room you want to save.
- Click at the top right of the message room.
- Click 'Save messages'.
- Read the precautions, and click 'OK'.
- Select the location where you want to save the messages, enter a file name, and click 'Save'.