Styling Album, Folder and Page Thumbnails
Galleries - 3:2
Folders - 1:1
Pages - 4:3
This adds a red “frame” (border); a gray “mat” (background); a dark drop shadow on all of the Albums/Galleries, Folders and Page thumbnails; and a white border/mat when hovered. Add this to your theme’s CSS or add a CSS block on your ‘All Galleries’ section.
You may have/want to create an unlisted galleries for specific format (1:1, 3:1, 3:2 etc) gallery feature images. You can see the square (1:1) format squishes the images unless you create specific crops.
I’ve included three formats (3:2, 4:3 and 1:1) below. Feel free to remove unused code and/or edit the sizes to suit.