I'll have to see if all this is actually possible. The print preview is something I don't fully control. This should become available in version 4.2 and I usually don't release test builds for these minor version updates, but this is a feature that benefits from user feedback. I can't give a timeframe though. Also, it's possible to run the absolute latest code without me releasing builds, but that requires some knowledge about the terminal/commandline and is not really advised if you don't really know what you're doing.
The idea is indeed to have a few base layouts, not everyone wants to mess with settings constantly. Definitely the current layouts will still be available.
That other thread is fine. Keeps the discussion about pedigree settings and this preview tool separated.