This blog will be short and sweet, but it's a game changer for those of use learning DAX.
One of my favorite keyboard shortcuts in DAX Power BI desktop is:
Ctrl Shift L
This lets you easily change multiple values in one go.
It is a bit strange and takes some practice to get used to what data to select and typing in multiple places at once, but it's super handy once you get the hang of it.
Here's a demo on how it works: