Sorry, it was a little late...
I want to make custom power ports. The default power library doesn't have a +15V and -15V rail, so I want to make those power ports respectively. I've made custom parts before in KiCAD but have never made a custom power port and I'm looking to make some.
When you create a new part, there is an option to create a power part. Do you just create one pin and that pin is net connected to all other pins of that type? When I load a default power port the reference field is #PWR and the value is +3.3V (for example). So if I create power port part with 1 pin (electrical type: power input), and then give the part reference field "#PWR" and whatever value I decide, will all those power ports be connected then?