In the Links section in the WP Dashboard it is possible to make the link open in a new tab/window.
It’s elementary html. Replace <a href= with <a target="_blank" href=
@staartmees the links in the Blogroll don’t work like that. It’s something that used to be in WordPress but was removed from Core in WP 3.5
@staartmees. I know elementary html, but if you had closely read my question you should have known, that is not what I wanted to know.
@piet Bos. Thank you, now I see it. I watched over it the first time. I can change it in the dashboard. Thanks.