Seems obvious once you see it but sometimes the easy things are the most ellusive.
If you’re noticed descriptions on some of your computer’s fabrication palettes and not others, it’s likely the “AutoSize” option you’re looking for.
Right-Click on an open area of the service palette and select the option you prefer. This applies to CADmep, CAMduct and ESTmep. Revit…not so much. Revit likes to do it’s own thing.