Some of my photos have captions and I do not want them visible. How do I hide them?
I think you can only target the whole gallery but, add a div around the ones you want hidden and hide with CSS.
Put this in caption
<html>
<div class="hideCaption">
caption text here <br />
more caption text here
</div>
</html>
The text is inside html tags so <br />'s will be needed for new llines.
Add this to your CSS
.notLoggedIn .hideCaption {display:none;}
Using a class means you can use <div class="hideCaption"> in any gallery in
any caption and the one CSS rule gets them all. :D