Hi Marco, hi Kevin,
If you want to stick to the image, I'd modified Kevin's coding as:
{
\override TextSpanner.bound-details.left.padding = #3.5
\override TextSpanner.bound-details.right.padding = #-3.5
\override TextSpanner.bound-details.left.text = \markup \lower #1 "fill "
\override TextSpanner.thickness = #1.8
\override TextSpanner.dash-fraction = #.5
\override TextSpanner.dash-period = #2
\override TextSpanner.bound-details.right.text = \markup \draw-line #'(0 . -1)
\override Rest.stencil = #ly:percent-repeat-item-interface::beat-slash
\override Rest.thickness = #0.48
\override Rest.slope = #1
\override Rest.X-extent = #'(-2 . 2)
r4 r\startTextSpan r r \stopTextSpan
r r r
}
Cheers,
Pierre