In general, format punctuation in the same font style in which the main content is formatted. This is especially important for punctuation after an element that receives different formatting to avoid the impression that the punctuation is part of the syntax. Examples are commands, options, keywords, placeholders, hyperlinks, pop-up text, and user input. However, if the punctuation is part of the syntax of an element, such as punctuation that a user must type, use the formatting that is appropriate for the element.

Microsoft style

Type Balance Due: in cell A14. (User types the colon.)

On the Insert menu, point to Picture, and then click From File.

Not Microsoft style

On the Insert menu, point to Picture, and then click From File.

Format parentheses and brackets in the same font style in which the main content is formatted. Never use two different styles, such as italic for an opening parenthesis and regular type for a closing parenthesis.