Open cube Care Notebook v2.
Now select the notebook you want to open.
Press the button Participants.
Only the administrator can add people to the log book. Select Add participants to add someone to the log book.
This will allow you to select different people.
Caution: These people must belong to your contacts.
Next, press "Ready".
Cubigo will now ask for a confirmation. Press "Yes".
You will still need to add the categories this person may view. Tick the appropriate categories.
Now, click Ready.