Rietveld for command is here:

https://codereview.appspot.com/6730044/

This patch allows the user to number groups of successive measures, which is useful as an aid to the performer in keeping track of repetitions. There is no requirement that the counted measures be repeated, however. The number is centered on the measure (discounting prefatory material), above the staff by default.

A new grob, a spanner called MeasureCounter,' is created. Each element of a count is an independent instance of this grob. A new event-class,measure- counter-event,' is also defined.

At present, the engraver, Measure_counter_engraver,' must be added to the relevant context (probably Staff) in the .ly file. This engraver has been written in Scheme, following the precedent ofSpan_stem_engraver.'

The user uses the commands \startMeasureCount' and\stopMeasureCount' to frame the measures to count. The initial number is read from a new grob-property, 'count-from, which may be overridden.

Issue 2924: Doc: \startMeasureCount and \stopMeasureCount needs documenting

The following patch is a preliminary step towards documenting the Measure_counter_engraver added in version 2.17.7. The patch consists of two snippets, the first illustrating basic usage, and the second demonstrating a workaround for creating centered bar numbers.

http://codereview.appspot.com/7678047

Patchy the autobot says: passes make, make test and a full make doc.

Patch on countdown for 23 March - 12:00 GMT

Patch counted down - please push

author David Nalesnik Sat, 16 Mar 2013 16:35:55 +0000 (11:35 -0500) committer James Lowe Sat, 23 Mar 2013 19:44:01 +0000 (19:44 +0000) commit 4d9770a67176122b9779426cf540ad1694f07f61

James--

Should I close this issue? Perhaps it should be kept open until full documentation is available (NR)?

The issue is already marked "Fixed". You might want to close the Rietveld review. Make a new issue for whatever you consider missing.