Just use Find and Replace
(Ctrl+H)
Click the “More” button on the lower left-hand side to show a lot more options.
Set font Courier New
to Find what and Courier New, 8pt
to Replace with
![From https://www.howtogeek.com/](https://cdn.statically.io/img/i.sstatic.net/3iO8W.png)
To avoid the issue altogether you could use Styles that allow you to centrally manage text formatting.