From the web interface:
1. Log in with your Familink account. If you forget your password, you can click on "forgot password" to create a new one.
2. Once you are logged in, you will arrive on the list of your Familink frames.
3. Quick method: click on the "message bubble" button of the Familink of your choice and write your message (limited to 1000 characters)
4. Long method: you can directly send a message when you are in the desired Familink. Click on the "blue bubble" icon at the bottom right (limited to 1000 characters)