There is nice tree printing mode for posters in myheritage.com. I use "ancestors" mode to print all ancestors for my daughter. But it prefers "birth" dads to step-dads, but in our familiy tree printing there is places where we actually prefer step-dads (cause of birth "dads" not being really part of family).
The same problem goes in match algorithms. I'm not interested in every marriage relatives match, but I interested in my step grand-grand father ansectors.
How I could mark step dads as "prefferable"?