Hi @meiandning,
Sorry for the previous response.
Just to add on the above, you can remove the border if you have the Foobox Pro version when you go to wordpressadmin->foobox->settings->look&feel and enable the flat theme as shown in the screenshot: https://monosnap.com/file/34yLKYM80LGWECXPvBZUHISGzR3kKv
However, if you are using the Foobox free version, you can add the code shown below to your theme’s style.css or customcss area in order to remove the border.
.fbx-light .fbx-inner, .fbx-light .fbx-next, .fbx-light .fbx-prev, .fbx-light .fbx-close{
background: transparent !important;
border-color: transparent !important;
color:white !important;
}
If you encounter any problem or if I may be missing something, don’t hesitate to ask.
Kind regards,
Blaise.