Configure Pin Swapping in Altium for a library component?
If you want to enable pin-swapping on a component from the altium libraries that does not have pin swapping already available, you're going to have to edit the library.

Find the built-in library (It'll likely be an *.IntLib), break it down to a schematic and PCB library (*.SchLib, *.PcbLib), and make your changes to the SchLib. Then, instead of using the assembled IntLib, you just add the two separate libraries to any project that needs them.