I am trying to modify a wordpress template of "envato market" called Kalium, it is a template dedicated to show photographic content, portfolios and galleries of various types, one of those types is one called "lightbox portfolio".
In the options of the theme there is an option to show the name of the portfolio (caption) when it is displayed in lightbox mode (in this mode only the image is shown in full screen and the controls to change from one image to another) that appears in the foot of the image.
I have searched for documentation everywhere to try to make that caption show only by passing the mouse over, but I honestly can not find the way to do it, so I would like to ask if there is someone who knows the template or someone who can give me some indication to be able to make that modification.