lightbox icons

hi,
sorry if this has been addressed already but I wasn't able to find any forum on this. when I add lightbox on picture there's only icon of Pinit available and I don't know how to add more or change it. I wouldn't mind not to have any there, it's just that have just pinit and nothing else is really annoying and useless.

pls see print screen below:

so again question is:

how can I remove Pin it icon?
/add more icons?
/edit icons in lightbox?

thanks
Brano