On Land

Environment Information
At Rill Architects we run ArchiCAD on macOS. If you work at Rill, this is your stuff. If you don't, but you work in ArchiCAD, you may find something interesting. Anybody else, I don't know.
RSS

Select an existing LC that is similar to the one you need to make. Click 'New'. (The other one. Lower left.) Put in the new name. Make changes to the showing and hiding of layers on the right. Click 'Update' at the bottom. OK and save.

You will probably need to create views for the new LC.

See also:
Creating Layers