These two constraint mode settings are now enabled and seeded using the default Hole to Hole spacing in 17.2. They are used to check clearance between mechanical pins (pins without a pin number) and act as a replacement for the obsolete usage options setting " Mech pins use antipads as Route Keepout " that was available in the 16.6 Padstack. The setting and value seen in the symbol will not be used when placing the symbol in a design (.brd) Hope this helps, Mike Catrambone
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