protel 99se is different from protel dxp ?
Global change is done by using "Find Similar Objects".
To globally edit multiple objects, right click one of the objects to be changed, and select "Find Similar Objects" from the menu. Choose the options you want to match in "Find Similar Objects" dialog, and click OK. The set of objects will now be selected, press F11 on the keyboard to display the "Inspector" panel, change the required value, and press Enter on the keyboard to apply the change.
It is a bit more complicated than Protel99SE, but it is a very powerful tool for selection and global change.