In order to start messaging a connection, both sides must indicate that they want to connect.
When a connection has been established, you'll see the individual or company in the "Connections" section of the request. By clicking "View details", you can access the "Messaging" screen:
Use the text box to begin a conversation! Keep in mind, you can only send messages as plain text. We don’t allow images or attachments at this time.
In the example below, Richard (a founder) started the conversation by sending a message to Rebecca Shakes (the investor):