To edit junction box schedule project settings, go to
Ribbon: DME: Customization->Project Customization-> 
Junction Box Schedule Label Group
Pulldown Menu: DM Electrical->Customization->Labels and Schedules->Project List->Edit Junction Box Schedule Project List
To edit junction box schedule standards settings, go to
Ribbon: DME: Customization->Master & Standards Customization-> 
Junction Box Schedule Label Group
Pulldown Menu: DM Electrical->Customization->Labels and Schedules->Standards and Master Lists->Edit Junction Box Schedule Standards List
Junction Box Schedule Label Display and Order Dialog Box
See the Common Label and Schedule Information section for more information about using the Move Up and Move Down buttons and the Key, Label, Width, Display, and Schedule Title fields.
Values in the Key column are listed alphabetically below.
Callout: The callout of the junction box as defined in the junction box project schedule.
Quantity: The number of junction boxes inserted in the project. If a junction box type is not inserted, "NOT USED" will be displayed.
Schedule Note 1: Note taken from the schedule.
Schedule Note 2: Note taken from the schedule.
Schedule Note 3: Note taken from the schedule.
Symbol: The block used to represent the the junction box.