Creo Expert Moldbase Extension > Options > Component Options > NOM_DIM_DISPLAY
  
NOM_DIM_DISPLAY
0: Show dimension Symbolname + description in the Nominal Dimension list of the component dialog box
1: Show only dimension Symbolname in the Nominal Dimension list of the component dialog box
2: Show only description in the Nominal Dimension list of the component dialog box
Default: 0