If you want to start a chat with multiple users, click on the [ + ▼ ] icon on the upper left of the chat screen and you can create a group chat from [ Create a new Group Chat ].

 

 

 

Change the Icon

You can set the image used for the chat on the chat list.
You may choose an icon or upload your own image. 
Icons can be a maximum of 700 KB and you may use JPEG, GIF, or PNG file extensions.

Where you make these changes:
 

 

Add Members

Select the checkbox next to the members you want to add.

Next, you can choose admin, member, or read-only privileges.
Admin member can add members to the chat and edit the chat description.
Members can write posts, and read-only users cannot write anything but can only read the chat.

 

 

You can narrow down a list of members you want to add by putting the name (in full or in part) in the search box.