When you create a Px property, a <properties> tag pair is entered into the Px file code to hold all property definitions. Each property that is created is defined by a set of parameters (such as "name", "type", and "value") and enclosed in a pair of <property> tags.

Figure 18.   Px Properties assigned in the Px file code

These property parameters are assigned to or removed from individual Px object properties through a process of Linking or Unlinking. When an object property is assigned a Px Property (using the Link popup menu item), the property sheet displays the Px Property name in the property value field with a light green background shading.

Figure 19.   Linked Px Property Names Display in Property Value Field with Shading