To create a group chat, open Messenger, tap on the 'New Message' icon, select multiple contacts, and then tap 'Create.' You can name the group and customize settings as needed.

Yes, you can send files and photos. Tap on the attachment icon in the chat window, select the file or image from your device, and hit 'Send' to share it.

To start a video call, open a chat with the person you want to call, then tap on the video camera icon in the upper right corner of the chat screen.

To customize chat themes, open a specific chat, tap on the chat name at the top, select 'Theme,' and choose your preferred style from the available options.

To mute notifications, open the chat you want to mute, tap on the chat name or icon at the top, select 'Notifications,' and choose to mute for a duration of your choice.