In some cases, a client will either use both their personal email and work email, or they may have a home phone number as well as a mobile phone number. In Trail, it's easy to store alternative contact details, if your client has more than one email or phone number.
1. Go to the Client's Profile
Find out how to do this here.
2. In the contacts box, find the client that you wish to add the additional details for, and click 'Edit Details'
3. Click on the green plus button at the top of the Contacts modal, then select whether you would like to add a phone number or email address
4. Add in the necessary details, and click 'Done'
This will now appear in the Profile for the client, below the primary phone number.