Abstract: A first block represents a two or three dimensional object in a Computer Aided Design (CAD) model, and has a visual presentation in a presentation of the CAD model based on a first plurality of property values denoted by a first label in a plurality of labels. User input specifying a new value for a first property value in the first plurality of property values is received. A second plurality of property values denoted by a second label is selected. The second plurality of property values differs by at least one value from the first plurality of property values and the second plurality of property values has a second property value that is satisfied by the new value. The visual presentation of the first block is updated based on the second plurality of property values.