Problem
You want to book an estimate into a job, but the Book Job button does not turn blue.
Solution
There are two options to do that:
You can either duplicate the estimate for a new job
You can add an appointment to the existing job
Book a new job
Go to the estimate you are trying to book.
Look for an option to duplicate the estimate and click it.
After duplicating, you will have a new estimate.
Book this new estimate into a new job.
Add an appointment to the existing job
Go to the job's page. This is the job you already booked.
Look for an option to add a new appointment and click it.
Follow the prompts to add the new appointment details.
Save the appointment.