The data in an automatic property is obtained from individual objects or their styles and is not entered manually. For example, a number of doors might have the same style but different widths. The automatic property Width may be different for each door. However, those doors have the same thickness, because thickness is a property of the style. The automatic property Thickness has the same value for all doors of the same style.
More than a 1,000 automatic properties are available in AutoCAD Architecture 2024 toolset. Most are self-explanatory, but a few need additional explanation.