There isn't an easy way to do that in Paint.NET. You would have to do the smallcaps letters in caps with a smaller font than any capitalized letters in your words, which would mean doing it separately.
Small text, also known as tiny text, is a group of unicode characters that look like small font text. Small text copy and paste gives your social media profiles like facebook, instagram and twitter and your text messages an attractive appearance and helps you stand out from the crowd.
A multi-format typeface family, Mencken appears in OpenType format, as well as Type 1 PostScript and TrueType (Type 1 and TrueType formats contain a special encoding for fractions as well as several additional fonts for small caps and all caps).
Auguste Sans from Colophon Foundry is definitely one of our favorites at the moment. Its clean lines and geometric forms give it a contemporary and versatile edge we absolutely love. This typeface strikes a balance between legibility and style, making it an excellent choice for a wide range of projects. Probably not the first font that comes to mind when it comes to best ui fonts, but using Auguste Sans for smaller headers can add a lot of character to your project. Something a lot of online environments lack nowadays.