SMS text unable to pinch zoom

[bbortnick]

A few versions ago, my one+1 used to allow pinch to zoom to view text messages, great for my middle aged eyes. At some point that stopped working. Some phone allow use the volume rocker to change size, that also does not work. There are no options in settings either. I have also tried 2 other SMS apps, and none have pinch to zoom. What changed? How can it be fixed? I am currently running 6.0.1
Thanks,
Barry