Quick update regarding the “Display Name Publicly As” option not showing up. It appears its an issue with developing the WP site via localhost, as the option appears for me just fine on my webhost.
I installed the Jetpack plugin and used the “CSS Stylesheet Editor” with the following CSS to remove the border from the lightbox:
#slb_viewer_wrap .slb_theme_slb_baseline .slb_container { padding: 0 !important; }
.slb_data { display: none !important; }
The first one gets rid of the border and the second removes the description area from the lightbox.
