On your PC screen or on paper?
For your viewing online or offline in the RSLogix editor, click on View, Properties (or right click the ladder background).
There is a tab called "Address Display" and at the bottom are options to turn on cross referencing for viewing.
If they are grayed out, you may first have to go to Tools, Options and on the third tab, check the tick-boxes to enable cross references online and offline. I don't know why these would need to be turned off, but I think that's the default.
These tools are not available in the free Micro Starter Lite version.