Proponents of double sentence spacing state that the extra space between sentences enhances readability by providing clearer breaks between sentences and making text appear more legible, particularly noting the very small visual difference between a dot and a comma.

Is double spacing grammatically correct?

Nearly all style guides agree that one space is correct.

The Publication Manual of the American Psychological Association (APA) was the only style guide that overtly recommended two spaces after a period, and even that long-time holdout for two spaces changed its guideline to one space in its 2019 update.

When should I use double spacing?

Double space between all lines of text, including between regular text and block quotations, between paragraphs, and between a heading and subsequent text. Use Microsoft Word's double-space line feature rather than manually created line spacing. Do not add additional space above or below the lines of text.