Set conversation data
Choose the coworker you want to start the conversation (1) with. You can adjust the icon and the color of the conversation (2).
Set a name (3) for the conversation. If you leave the name of the conversation empty, the name will consist of the three names of the first participants in the chat.
Decide whether you want the conversation to be private or public (4). Public conversations can be accessed by all coworkers in the organisation, private conversations are completely invisible to all users but the participants.

Keeping an overview:
Similar to WhatsApp, Recent conversations wander to the top, so you do not have to worry about losing your overview. Grape manages this for you.