Booking Calendar: How to add custom notes to appointment card
The Groundhogg booking calendar offers the ability to leave private notes on each appointment. You don’t need any other extension to use this.
Go into the appointment that is booked (that will be under Groundhogg > Appointments) and click on the appointment. In the right-hand side will show the contact, time, details, guest timezone, and an area for notes.
You can put any notes you want into there, the notes will only be visible to any admin.
If you wish for others to be able to see these notes then consider putting these notes inside of the contact notes, or inside of the deal.