Open the chat you want to export.
Tap the name or number at the top of the chat window to open Options. Then scroll down and tap "Export Chat.
A window may pop up. Is so, please choose 'Include media' or 'Attach media'.
Choose what you would like to do with the exported chat. You can send it via email or save it to your files to send a different way.
Please do not take screenshots of your chat as we will struggle to understand the correct timeline of the messages.