When you have finished the Post Card Library Element, you can then use it on a page or in a Layout, using the Post Cards Element. See that document for a full rundown of specific Element options, but basically, this is where you choose how to lay out the Post Card on the page, and which content to use. As an example, I will walk through using the Post Cards Element to display the Blog Post Card Library Element we created above.
There are three tabs on the Post Cards Element. In the General Tab, you decide what Post Card you will be using, the content source and post type, and how it will be ordered etc. Then on the Design tab, you choose the Layout and the Alignment, and other design options, and finally on the Extras tab, you can apply animation to the Element.
For our example, on the General tab, as you can see below, we want to use the Blog Post Card, with a Content Source of Posts, and a Post Type of Posts (if we chose Terms with a Post Type of Posts, it would display the Blog Categories, rather than the individual blog posts themselves).
And in the Design Tab, I would choose to display the Post Cards in a three column Grid, and I’ll also choose Stretch as the Alignment, so the Cards are all the same height. You can see this in action in the second row, where the middle Title stretches over two lines, but the other two posts in the row are the same height.
This Element could then be used on the Blog page as an alternative to the Blog Element, giving you more control over the design and information displayed. And in the same way, you could create individual Post Cards for WooCommerce Products, portfolio posts, FAQ items etc. Post Cards are a very powerful, and very flexible way to present post types throughout your site.