I'm new to Eagle CAD but a million years ago was a HW designer so I am familiar with creating making new packages - symbols etc. I've created a new FET --- found the right TO-92 package in the FET reference -- used a suitable N-channel FET symbol - made a new library. Looks good except when I place the component on a schematic I get a U3 designator --- I should get a Q2 (as I already have one other FET down). Where do I correct this ??