.bypostauthor {
display: block;
font-size: inherit;
}
.gallery-caption {
font-size: 13px;
font-weight: 400;
line-height: 1.5;
padding: 10px;
}
.gallery-columns-7 .gallery-caption,
.gallery-columns-8 .gallery-caption,
.gallery-columns-9 .gallery-caption {
display: none;
}