Not sure what you mean by 'Customize' QuickPick. If you mean change what comes up when it's activated, while you can't changed what you see in the list, you can change the order of priority between such things as Faces versus Edges versus Bodies by changing which 'Selection Priority' option it is that you're using.
BTW, here's a 'tip' for you. Go into Selection Preferences and toggle OFF the 'QuickPick on Delay' option. This way you will ONLY see the QuickPick dialog when YOU want to see it, not when the system times-out based on the QuickPick 'Delay' setting. All you have to do to get the QuickPick dialog to appear is place the cursor over what you you wish to select and hold down MB1 for approximately 1/2 second. This way you will not have to either wait for QucikPick to activate or find that it's activating way too fast or too often. Anyway, give it a try I think you will see that life is much simpler with QuickPick only coming-up when you want it to.
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA Siemens PLM: UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.