< p>1. In PowerDesigner version, the Inheritance icon on the toolbar is disabled by default, as shown in the following figure:
Tools->Model Options->Model Settings->Notation is set to “E/R+Merise”, the specific steps are shown in the figure below:

Notation selects Barker by default.

Change to “E/R+Merise” is fine.

Now the toolbar can use those three The disabled icon is shown in the following figure:
2,cancel disabled The method is as follows:
