Yes.
.NB-text-view-detail {text-align: justify;}
.NB-text-view-detail img { display: block; margin: auto; }
.NB-story-view {text-align: justify;}
.NB-story-view img { display: block; margin: auto; }
.NB-text-view {text-align: justify;}
.NB-text-view img { display: block; margin: auto; }
.NB-feed-stories {text-align: justify;}
.NB-feed-stories img { display: block; margin: auto; }
.NB-feed-story-view {text-align: justify;}
.NB-feed-story-view img { display: block; margin: auto; }
(I went across page source code to find the right stuff. Perhaps you need to improve help system).