⌂ Time signature printing only the numerator as a number (instead of the fraction)

Sometimes, a time signature should not print the whole fraction (for example, 7/4), but only the numerator (digit 7 in this case). This can be easily done by using \override Staff.TimeSignature.style = #'single-digit to change the style permanently. By using \revert Staff.TimeSignature.style, this setting can be reversed. To apply the single-digit style to only one time signature, use the \override command and prefix it with a \once.