To rename a group Chat:
- Tap the double speech bubble icon on the upper right.
- Select the chat you want to rename.
- Tap the (...) icon next to the name current name.
- Tap "Edit" at the top right
- Enter the new name. The name of the chat is limited to 25 chars.
- Tap "Done" and the new name will be saved.
For more information about Vero Chat see, How do I change settings for a chat?