milond:
You could create them with the
Wall or
Slab tools, or create them with the
Profile Manager and assign the profile to the
Column tool.
For more information with images, go to Help > ArchiCAD Help, when your browser opens click on the "Search" tab, and input
TOPIC in the search box, the results list will lead to detailed information about each tool.
You should add a Signature to your Profile (click the Profile button near the top of this page) with your ArchiCAD version and operating system (see mine for an example) for more accurate help in this forum.
David