Usually the slots will show up after you package the design.
If you place the symbol in the DxDesigner, you can also use the "pdbslot" command to assign a slot without packaging
Does that happen with 2 pin parts only?
Majority of time the show up when I pick the part in DxDatabook...
Forgive me for the ignorant questions. We are transitioning from LMS to DMS/EE 7.9.2