Use Markdown syntax: wrap text in double asterisks, like **bold**
Use HTML syntax: wrap text in `` tags, like `bold`
In Microsoft Word: select the text and press Ctrl+B on Windows or Command+B on Mac
In Google Docs: select the text and press Ctrl+B on Windows or Command+B on Mac
In many text editors: use the Bold button in the formatting toolbar
In plain text apps: use the platform’s supported formatting or markup syntax