Routing classes define track and vias styles for PCB routing. Routing classes can be assigned to a Net or Layer so that you can define styles that are only valid for tracks and vias on a given Net or on a given Layer.
The PCB class
The PCB class is the base class. All other classes are derived from the PCB class and inherit all basic settings that have the value set to Automatic.
The Default class
The Default class defines generic settings.
To add a new routing class
Select the PCB class.
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Click the New Class button.
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In the dialog box, specify the name of the class.
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Click Ok.
To add a variant of a class
Select the class.
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Click the New Class button.
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In the dialog box, specify the class name and check the Create as a variant option.
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Click Ok. The new class inherits all the settings of the parent class and has all the parameters set to Automatic. Redefine only those parameters whose value differs from that of the parent class.
To remove a DRC class
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Click on the name of the class to be removed.
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Click the Delete Class button.