Emacs Init: Line Height

To set a default line spacing, put this in your Emacs Init File:

(setq-default line-spacing 0.5)

The value can be a integer or decimal number.

• If integer, it means pixels, added below each line.
• If float, a scaling factor relative to current window's default line height.
• If nil, add no extra spacing.

Note that the spacing height between lines also depends on font. 〔see Emacs Init: Setup Font〕