My vertical Y-axis title includes a Greek letter, but it is horizontal in layouts or when copied and pasted into Word.

This problem only occurs on a few computers, so has something to do with fonts, printer driver, screen driver, or Windows. So our first recommendation is: Try a different computer.

The problem seems to happen only at certain font sizes. So try making the graphs larger or smaller in the layout. Or, in Word, select the object, and drag it a big bigger or smaller until the Greek letter snaps into its proper vertical orientation.