I have been able to figure out one or two things myself. There are two use cases for share bottons.
1) in the #top-bar I have share buttons now directing to your my other presences on the web. With the custom options in graphene options I have created also a flipboard magazine link. (www.leika.nl) setting up these buttons is a very nice solution, thanks graphene! I used the custom mode to create monochrome buttons.
QUESTION: how do I arrange these icons in the TOP-BAR on the RIGHT side of the #top-bar?
2) Jetpack has share buttons as well. These buttons can be placed on pages, posts etc. The services offered are not expandable unfortunately, or I did not find a way to figure it out... my initial question was about this jetpack option.
I would be much obliged if you could answer my alignment question.
Thanks for your help