I am not a techy person, but am in charge of our website. It was originally devoloped by someone else so I am still learning.
Please tell me there is a way, other than selecting from the different "headings" to adjust the font size.
In WordPress, font sizes and typography are determined by your site’s theme. Every WordPress theme includes a file called a stylesheet (style.css). That file contains all the instructions for how your pages and content should look, including fonts, colors, and even the page layouts.
You can view and edit this file by going to: Appearance > Editor. When you do, you’ll notice that the file is made up of a series of instructions in CSS format (Cascading Style Sheets). If you’re comfortable with editing CSS, you can make changes to this stylesheet — but those changes will be overwritten if/when you update your theme.
For this reason, it’s better to override your theme styles by going to the Customizer and clicking the “Additional CSS” module at the bottom of the left-hand side. Any CSS instructions you enter here will override the CSS specified by your site’s theme.
When you’re editing a page or post in WordPress, you’re limited to the paragraph and heading options in the drop-down menu in the Editor Toolbar. But be aware that applying headers (h1, h2, h3, etc.) doesn’t just change the size of your fonts. It also has SEO implications. Those headings are indexed by search engines, and priority given to the higher numbers. An H1 tag tells Google, “This is what this page is about.”
This is why it’s best to override your theme’s styles using CSS.
If you’d like to learn more about CSS, here’s an excellent course for beginners: https://wpinonemonth.com/product/html-css-webinar/
And here’s another: https://www.wp101.com/go/intro-html-css/
If you just don’t want to mess with it, you might just hire someone to knock it out for you quickly and inexpensively. We recommend the experts at Codeable, who can handle tasks like this at very low cost: https://www.wp101.com/help/
Hope this helps!