Adding a contact note is simple. Clicking the blue plus button opens up the required form.
Firstly select the communication type. This is so your team know how this communication was made and thus where to find a record of it.
If your team need to follow up on this, tick the box to the right and select a date. When necessary this will make it so the assigned members of staff get notifications, and this follow up gets added to the contact screen.
Beneath this is a text box to add your note, this is where you can make a note of your communication with the customer.