How we display text in modern word processors such as Microsoft Word depends on norms from the age of typewriters and even the dawn of the printing press.
When I (accidentally) used a non-standard glyph for the Greek letter kappa in my PhD thesis, the line spacing of 1.0 in Word became a fourth wider - at nominally identical font type and size. I then learned that the interline distance (in fact not 1 for 1.0) is calculated based on letter shapes to emulate historic typesetting.
How we display text in modern word processors such as Microsoft Word depends on norms from the age of typewriters and even the dawn of the printing press.
When I (accidentally) used a non-standard glyph for the Greek letter kappa in my PhD thesis, the line spacing of 1.0 in Word became a fourth wider - at nominally identical font type and size. I then learned that the interline distance (in fact not 1 for 1.0) is calculated based on letter shapes to emulate historic typesetting.