Hey there Anton,
How are you today?
Generally this should be possible with some custom CSS. Depends really on what you’re trying to change. If you’re looking to change paragraph size on post or pages you can do that by adding the following CSS code in the style.css file of your child theme or add it in your site using the following plugin:
https://www.ads-software.com/plugins/simple-custom-css
.entry-content p {
font-size: 16px;
}
This should be original size of the paragraph font, please increase/decrease the numeric value to change the font size. If this doesn’t work please post link to your site so I can take a look.
Hope this helps ??
Best regards,
Bojan