By default, an inline link (i.e., hypertext in the middle of a sentence) is not expandable, but if the link is on a line by itself (i.e., inside paragraph tags), and if you have set your to show disclosure widgets, there will be an icon () for expanding and collapsing the contents of the post in front of the hyperlink. Here you can change that.

• Don't show — no contents and no disclosure widget to expand the contents on demand (i.e., the typical behavior of hypertext in a web page)
• On demand — show the disclosure widget for expanding the contents on demand
• Always show — show the contents without having to click a disclosure widget (i.e., useful for quotations, and for "template" content)

If the contents are to be shown, the Indent option determines whether or not the contents will be indented relative to the title.