Barista has a few areas where images are scaled and cropped automatically. This can prove a bit tricky to get your images to look how you want, unless you know the minimum size requirements. As long as your images meet these requirements, you shouldn't have any trouble adding images to your website.

What is the Summary option and why should I use it?

If you use the built-in blog feature in Barista, you've probably noticed that you have two options of how to show your posts on the blog page. One is to show the full post and the second is to show a teaser of each post. Showing a teaser of each post is a great option, because it eliminates a lot of scrolling and your readers are likely to stay on your blog longer if they can quickly see your posts.