[GNC] Changing typeface using CSS (Windows 10)

[TERRENCE BRANSCOMBE]

Hello all, 

I've been a user for all of 2 weeks, so I apologize to everyone if this question/subject has been beaten to death in the past. My research online has not resulted in a fix, though, so I'd like to ask: has anyone running gnucash 4.12 or 4.13 on Windows 10 managed to change font families using CSS ? The documentation I've found on the subject suggests Windows users can change typefaces using CSS by editing the file GNC_CONFIG_HOME/gtk-3.0.css by adding a section like this : 

/* Application wide font setting */ 
gnc-id-main-window { 
font-family: Microsoft Calibri; 
font-size: 24pt; 
} 

Following these directions I edited the file gtk-3.0.css in the folder C:\Users\<username>\AppData\Roaming\GnuCash with the setting shown above; but, upon restarting gnucash I see absolutely no font change whatsoever. For grins, I copied this file to the AppData\Local\GnuCash directory as well, and again restarted gnucash. Sadly, same non-result. 

Any hints greatly appreciated, 

Terry