Cochrane Style Manual
Paragraph break

Review Manager 5 (RevMan 5) automatically creates a new paragraph when the ‘Enter' or 'Return' key is pressed once. (Unlike in RevMan 4, there is no need to include a blank line between paragraphs.) The spacing between paragraphs in RevMan 5 cannot be modified.

Soft returns (i.e. holding the 'Shift' key when pressing 'Enter') are recommended in footnotes.