The user could use the Mass Edit tool to select a group of notes, or the whole document, and there could be options for fixed or movable Do. For movable Do, the user would enter the key of the selection and the plugin would do the rest. If there is more than one voice on a staff it could automatically use only, say, the upper voice for syllables.

If anyone knows of such a plugin or could write one, please let me know.

Thanks,

Albert Frantz