Quick Tip: How to Center Images in a WordPress Gallery Block

Here’s a quick tip for centering images in a WordPress gallery block vertically and horizontally. I used this for a client logo list (see an example below).

.gallery--vertical-sample .blocks-gallery-grid,
.gallery--vertical-sample .wp-block-gallery {
    justify-content: center;
    align-items: center;
}
.gallery--vertical-sample .blocks-gallery-grid .blocks-gallery-image,
.gallery--vertical-sample .blocks-gallery-grid .blocks-gallery-item,
.gallery--vertical-sample .wp-block-gallery .blocks-gallery-image,
.gallery--vertical-sample .wp-block-gallery .blocks-gallery-item {
    align-items: center;
}