Show the image info without the "i" button.

I think that is part of the classic interface. You can see it on http://galleria.io/themes/classic/

But you could add some css rules in your theme to force the description to appear or the info to disappear:

/* Display the available text and/or description. We set this !important otherwise a click on the box would make it disappear (offset the javascript toggle functionality) */ 
.galleria-info-text {
  display: block !important;
}

/* Hide the "i" (information button) and "x" (close button). We set this !important to offset the javascript toggle functionality */ 
.galleria-info-link,
.galleria-info-close {
  display: none !important;
}

Hope this helps...

A cleaner solution is to add the property

_toggleInfo

and set it to

FALSE

in the configuration for the Galleria set.

Where do I add this property? I tried to "Data config" and "Extend" in settings view.
The solution to force CSS, it worked, but I would like the option to hide the title.