Start overĭespite the best of intentions, a document can become overwhelmed by direct formatting and modified styles. You can change styles, but you can't create custom styles in the browser. The browser edition supports existing styles.
There's no demonstration file you won't need one. Styles have always been around, and although you can implement them in older versions, the step-by-step instructions will differ. I'm using Word 2016 (desktop) on a Windows 10 64-bit system. Microsoft 365: A cheat sheet (free PDF).How to use PowerPoint's morph feature to move bullet points.Excel is still a security headache after 30 years because of this one feature.How to see who is trying to break into your Office 365 and what they're trying to hack.