Can I change font sizes by changing numbers before “px”?
For example, if I changed the number before px from 40 to 30 as shown below, does it make the font size smaller?
Yes, you can change it. And yes, it should make the font size smaller.
I thought so and tried it, but it did not work. There appeared a cross mark in red, indicating, I guess, that I did something wrong.
It looks like you did not apply your changes, so I can’t check what’s wrong.
FYI, I am using a plug-in called Simple Custom CSS.
We were recommending this plugin in past, until WordPress got its Additional CSS section. Now we recommend to add CSS code into the Additional CSS section since it’s a WordPress feature and it means one less plugin.
Kind Regards, Roman.