Editing a job group brings up this editor to define that job group. You'll also see this when creating a new job group.

Field name  | 
Description  | 
Description  | 
Name of the job group.  | 
Parent  | 
For nesting one job group within another. Note that a job group with children cannot itself have a parent. Job groups can be nested only one level deep.  | 
Default hourly value  | 
When crediting someone with hours for a job, if the job has no hourly value associated with it, VSys will look here for the appropriate value.  | 
If checked, this job group and jobs within it will be shown at the bottom of most editors and in italics. Use this instead of deleting a job group, since deleting it cannot be un-done and results in the permanent loss of information.  |