Using ReverseName option

[simbun]

(13-01-2021 12:51)HardBop Wrote:  I'm trying, on my control point, to display the composer in the index by the latter; surname and then Christian name.

Have you tried in tagValue: Composer.value.index={ComposerSort}
ComposerSort will also need to be referened in itemTags if it isn't already.

That should just change the display of the index, leaving the sort order unaffected.