What is the difference between type and instance parameter in Revit?- Tutorial
Instance vs Type Parameters. What is the difference between type and instance parameter in Revit?
Type Parameter If you change the table's width and length in the "Edit Type" dialog, all tables of that type will have the new width and length. Instance Parameter If you change the table's height for a specific table instance using the "Properties" window, only that table's height will be affected, not all the tables of the same type.