Use this procedure to add an anchor property definition to a property set definition. Anchor property definitions allow one object to get data from another object to which it is anchored. For example, an anchor property of a door in a 2-hour fire-rated wall could display the 2-hour fire-rating of the wall with an anchor property definition specified. The information displayed cannot be edited directly. 
-  Click 

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- Expand Documentation Objects, and expand Property Set Definitions. 
 
- Select the property set definition that you want to change. 
 
- On the Definition tab, click 
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- Enter a name for the anchor property. 
 
- If you do not want to use the property name for the description, clear Use property name for description. 
 
- Select the property definition to be associated with this property set. 
 
- Click OK, and continue working on the property set definition on the Definition tab of the Property Set Definition dialog box. 
 
- If Use property name for description was not selected, enter a description for the new property by selecting the empty value, entering text for Description, and clicking OK. 
To change the name of the property definition, double-click the value for Name. 
  
- Select a format to specify the how the data displays. 
The format you select becomes the default format of a column when this property is added to a schedule table style. It can be changed at any time. The Example column shows how the default value is displayed using the selected format. 
  
- Clear Visible if you do not want this property definition to appear on the Extended Data tab of the Properties palette. 
 
- Enter a number for Order if you want this property definition to appear on the Extended Data tab in a particular order. 
 
- Click OK.