By standard, the units setting displays four decimal points. This wiki shows how to change this accuracy for the units.
Please follow the below steps to achieve this.
1. Go to backstage File > Settings > File > Design File Settings. or simply search and open it from the Search Ribbon.
2. In the Design File Settings dialog, select last page Working units and change the accuracy as you like.
The part list creations works with the same setting. To get more or less digits in the part list you need to change this setting again.