Related Questions:
Can I add more lost reasons?
Can I change the lost reasons on my Bookings?
Answer:
How to add Lost Reasons:
Select Settings
Select Fields
Select Setup Values
Click on Lost Reason
Select Add Lost Reason
Input Value
Select Save
How to edit Lost Reasons:
Select Settings
Select Fields
Select Setup Values
Click on Lost Reason
Select on the field you would like to edit and click the purple modify pencil
Edit the field and click Save