Change text of Load More Button

Add this code to the Custom CSS field on your Photo Gallery widget’s Style tab:

.global-styles, .eapp-photo-gallery-photo-gallery-loadMore {
font-size: 0px !important;
}
.global-styles, .eapp-photo-gallery-photo-gallery-loadMore::after {
content: 'YOUR TEXT';
font-size: 15px;
}