On the ribbon, go to Tools > Setups > Jobs > Job Type.
A job type that is currently in use in the Jim2 database cannot be deleted. Jim2 will perform a check and a warning message will appear.
If an Item has been used on a job, the job type also cannot be changed.
Further information
Enable Projects
Set up Job Types
Managed Services Options
Set Up Actions
Set Up Project Types
Stock Yield Types
Items