Archicad includes a predefined set of default fills.
Use the Options > Element Attributes > Fills dialog box to define and/or edit fills and patterns, and determine the category of each particular Fill (Drafting Fill, Cut Fill, and/or Cover Fill).
For general information: see Using the attribute dialogs.
You can modify this set manually or by importing items with the Attributes palette.
See Attributes palette.
Set Fill Availability by Category (Drafting, Cover, Cut)
Use the Availability Panel of the Fills dialog to define one or more categories for each Fill.
See Fill Categories.