Once you have published your post, the display of your post is controlled by your theme, not MyCurator. There are some options that do affect how your theme will display curated posts that originate with MyCurator.
The first thing to check is how posts are displayed on your site’s home or blog page. Most themes have an option for what they display. If you choose the full content, then the whole post will be displayed. You can change this by inserting More tags into your post. Most themes will only display the content of the post up to the More tag (called the teaser). They will then display a ‘Read More’ link to bring you to the full post (as will clicking on the title). As you curate posts, you’ll want to insert More tags for those with a lot of content.