Problem
The custom field dropdown menu on the Job Booking screen shows no options to choose from.
Solution
Go to Settings > Operations > Custom Fields.
Click Edit next to the custom field.
Scroll to the Type section, click the dropdown, and add options for the dropdown menu:
Enter the first option name.
Click Add Option to create more options.
Repeat this process for all dropdown options you need.
When finished, click Save.
Go to the Job Booking screen to test the changes.
Refresh the page if needed.
Verify that all added options are now visible.