Hello Django

This setting is applicable for Image Popup only.

Please use this CSS to Template Options -> Custom Code -> Custom CSS to hide it in the thumnbnail.

.speasyimagegallery-album-info .speasyimagegallery-album-meta{
    display: none;
}

Best regards

Thanks a lot Ofi ! Another question that my client will probably ask me : how can we have the titles of all the images of a gallery always displayed (with linear-gradient in background) ?

Try this CSS to Template Options -> Custom Code -> Custom CSS

.speasyimagegallery-gallery-item-title{
    color: #000;
}
.speasyimagegallery-gallery-item-content{
    opacity: 1 !important;
}

Perfect ! And you even thought to put the text in black, to have the grey background only on hover ! Thanks a lot for your fast and efficient help.

You are welcome