When you refer to a particular word or phrase as the word or phrase itself, use italics. For other uses of italics, see guidance about text formatting.
Recommended: Don't use & (ampersand) as a conjunction. Use the word and instead.
Not recommended: Don't use & (ampersand) as a conjunction. Use the word and instead.
When you need to refer to letters as letters, use italics.
Recommended: To form a possessive of a singular noun, add 's to the end of the word.
Not recommended: To form a possessive of a singular noun, add "'s" to the end of the word.
For more information, see Pluralizing a single letter.