It’s a common mistake to denote heading level by its font size only. The popular Bootstrap CSS framework does exactly that

The letter x is not a multiplication sign. Use the times sign (×) to denote multiplication

What confuses a heck out of me is that so many articles on design and typography are being published on Medium

Don’t read this book: The book is split into three sections: Letter, Text and Grid. This gives the illusion of structure, but don’t be fooled...

Traditionally an underline was used for emphasis

At Artem Gorbunov Design Bureau, we have created a set of check marks for many popular fonts

Some lawyers think they should shout at their readers by using all-caps text — this is how they communicate the idea “this is important”