By default, the custom featured posts will display the most recent posts you've published.
How to display featured posts from a label?
Go to your blog dashboard > Theme > open the Featured Posts widget > replace this:
<script type="text/javascript" src="/feeds/posts/default/?published&alt=json-in-script&callback=featuredposts"></script>With this:
<script type="text/javascript" src="/feeds/posts/default/-/Label Name?published&alt=json-in-script&callback=featuredposts"></script>Replace Label Name with the name of the label you want to display posts from.
Important: Blogger's labels are case sensistive, so the label has to be written exactly the same way you've written it in your posts, otherwise no posts will be displayed.
Featured posts settings
To edit the fonts and colors of the widget, go to Theme > Customize > Advanced > click on "Sizing" to expand the dropdown > scroll down until you find the "Featured Posts (Home)" section.
<script type="text/javascript">
var numposts = 3;
var random_posts = !1;
var heading = "The Featured";
</script>var numposts - change the number of posts to scroll through
var random_posts - !1 shows the posts in order; !0 shows random posts
var heading - change the title of the widget (keep the double quotation marks around it)