To review your object extensions in the Resource Editor, select Manage Object Extensions from the property sheet menu.
You can create basic new properties and lists using the wizards available from the property sheet menu.
To perform more advanced editing of extensions, you must open the appropriate extension.
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Open the property sheet of the object, click the menu button, and select Manage Object Extensions.
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Specify the Extension that you want to open, from the list of files attached to the model.
An object can be extended in the Profile category of multiple extensions. You can select an existing file or create a new one.
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[optional] Select the checkbox to set the chosen extension as the default.
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Click OK to open the chosen extension in the Resource Editor.
For detailed information about editing files in the Resource Editor, see
Chapter 3, Extending Your Models with Profiles in Customizing and Extending PowerDesigner
.