What is being clicked on to bring up this menu? When I click the dropdown arrow next to my measure under the Values section, I get just two options: 'Remove Field' and 'Quick Calc'. I thought I might be using an old version of PowerBI Desktop, but I have Version: 2.37.4464.602 64-bit (July, 2016).

I'm completely baffled. Looks like I'm missing a step somewhere.