#Resource If you sometimes want to include a specific part of a previous email rather than nothing at all, you can use the "Include selected text" option: In the same Composing settings tab, make sure "Quote the text of the original message" is checked. Select the option "Include selected text, if any; otherwise include all text". How to use it: Highlight only the specific sentence or paragraph you want to reference in the original email before you hit Reply. Mail will then only include that snippet instead of the whole chain. Apple Support Community Would you also like to know how to hide the blue vertical lines (quote levels) if you do decide to keep some text?