I searched the forum and the Help file, found nothing that addresses this question?
Is it possible with ties to preserve the original notes? This is not uncommon with hymns when words or syllables in one verse require, say, a half note but in another verse might require two quarter notes.
You could have the two different rhythms in different voices. But usual practice for hymns (in my experience) is just to have the subdivided notes with a dashed tie, so that you either tie or don’t tie, according to the words.
Conventions have certainly changed in the past 40 years, for sure. And of course “convention” is a loose term. Some Lutheran hymnals don’t even have time signatures (neither did the last one I typeset)! Internal consistency is the main thing.