Editing Custom Library Parts and Components
There are two ways to edit a GDL object saved from ArchiCAD elements:
1.Edit its script
See Editing the Script of a GDL Object.
2.Keep the original ArchiCAD elements from which you have saved the GDL library part. This way, you can edit those elements and re-save the library part (overwriting its previous version.)
To keep the original elements available for later use, you can do one of the following.
•place them on a separate layer, then hide that layer
•save them in a separate PLN file
•save and export them as a module (.mod file)