Duplicating floors copies objects from one floor to the other. These objects can only be selected objects or all objects.
The list in the dialog consists of the Fold and Copy columns. In the floor column, there are floors other than the active floor in the project, and there are boxes for each of them in the copy column.
You need multiple floors for duplicating. Add new floors from floor general settings.
Click the Layout / Fold Copy line in the classic menu , and the Tools / Change / Copy Fold icon in the ribbon menu .
In the dialog that opens, mark the floors to be copied, uncheck the floors that will not be copied.
When you click the OK button, the objects on the floor you are working on will be copied to other floors.
