[updated for Modern Comments, Nov 2022]
Tired eyes, tiny type? Bump up the font size in the Reviewing pane to read Comments and tracked changes in MS Word with less strain.
The easiest fix is to change the zoom setting in the Reviewing pane. This doesn’t change the actual font size, but it makes it easier to read! Scroll down for video demos using classic Comments in Word 365 for Mac and for Windows. (Instructions on increasing font size in Comment balloons are in this other post, but they don’t work in the 2019 version of Word because Comments are now set to “normal” style, nor does adjusting styles work with Modern Comments.)