Administration Pannel  Display  Pictures and Colors  Colors & CSS  CSS Stylesheet

Code:

.imagelist_desc {
 font-size: 0px;
}
.imagelist_desc::after {
  content: 'NEW title here';
  font-family: Helvetica,Arial,sans-serif!important;
  font-size: 14px; /* you can play with the font-size ...increase/decrease as many as you want */
}