When you build or modify a schedule, you can add keys that automate creating new schedules and adding parameters to elements.
Video: Use Shared Parameters in a Key Schedule.
Revit LT automatically fills in the Key name. This is the name that appears among the element's instance properties. If desired, enter a new name.
Fields or parameters from the selected category can be scheduled using keys. Additional project parameters and shared parameters can be added to the category and scheduled.
The key schedule opens.
Each row creates a new value for the key. For example, if you are creating a room key schedule, you can create key values for executive conference room, small conference room, large conference room, executive office, standard office, and so on.