Allowing fingerings to be printed inside the staff

By default, vertically oriented fingerings are positioned outside the staff; that behavior, however, may be disabled. Attention needs to be paid to situations where fingerings and stems are in the same direction: by default, fingerings will avoid only beamed stems. That setting can be changed to avoid no stems or all stems; the following example demonstrates these two options, as well as how to go back to the default behavior.

\version "2.24"

\relative c' {
  <c-1 e-2 g-3 b-5>2
  \override Fingering.staff-padding = #'()
  <c-1 e-2 g-3 b-5>4 g'-0
  a8[-1 b]-2 g-0 r
  \override Fingering.add-stem-support = ##f
  a[-1 b]-2 g-0 r
  \override Fingering.add-stem-support = ##t
  a[-1 b]-2 g-0 r
  \override Fingering.add-stem-support = #only-if-beamed
  a[-1 b]-2 g-0 r
}