Customer context: The customer wants to prevent a visitor from changing their email address in the chat transcript screen.
Customer: How to prevent visitors from changing their email addresses in the chat transcript screen?
Answer: You can use the following CSS code (add it to Configuration > Chat > Chat buttons > edit Chat button > Chat window > edit custom CSS) to disable the user's interactions with the email address field:
.TranscriptViewFields {
pointer-events: none;
user-select: none;
}