You can select several property nodes by holding the CTRL key down. Then if you edit one or more properties, all properties will be affected in all selected nodes. If several nodes are selected a confirmation dialog will appear as shown below.
You can by rigth clicking on a domain or family node select a type of node to select. Then a dialog will ask you which class you want to select. All classes present in the tree under the selection root will be selectable as shown below.
You can select multiple properties by using a filter. Select “Multiple selection” from the tools menu to display the multiple selection table.