This page describes the "General platform settings" section.
Once logged in, navigate via the top menu to "Platform settings," then click "General platform settings" in the menu on the left.
Here's the view of the "General platform settings" page.
Under "VIEW" you'll find two fields, each with the same two options: "Company wide" and "User specific."
Under "DEFAULT UNITS" you'll find two fields, each with two different options, shown below. The chosen units will be used across a large portion of the platform. Not every value on the platform, however, will be converted into the chosen units.