But what does the Schedule actually list?
It can display rows only if there was something to list based on the criteria.
Then each row actually represents an element in your ARCHICAD project. And when you enter values in those cells, then the corresponding parameters of those elements will be set. So that data is not lost.
Unless I misunderstand something.
ARCHICAD Schedules are completely linked to the project database. You cannot treat them like an independent spreadsheet into which you can just place data. I know other programs like Revit and Vectorworks let you do such things to various degrees, but it is not possible to do in ARCHICAD.
Maybe the best way would still be to do it in Excel, then save the Excel as PDF and place that as a Drawing in ARCHICAD. Whenever the Excel changes, you resave the PDF and update the Drawing in ARCHICAD.
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