--- /dev/null
+\version "2.14.0"
+
+\header {
+
+ texidoc = "
+Negative fret numbers calculated due to assigning a string number
+can be displayed, ignored, or recalculated. Here we should have
+all three cases demonstrated.
+"
+
+}
+
+myMusic = \relative c' {
+ <c\1>1 ^\markup { recalculate }
+ \set TabStaff.handleNegativeFrets = #'include
+ <c\1>1 ^ \markup { include }
+ \set TabStaff.handleNegativeFrets = #'ignore
+ <c\1>1 ^ \markup { ignore }
+}
+
+\score {
+ <<
+ \new Staff {
+ \clef "treble_8"
+ \textLengthOn
+ \myMusic
+ }
+ \new TabStaff {
+ \myMusic
+ }
+ >>
+}