You can bookmark stories if you want to continue reading them later. For this to work, you have to use an account and you have to be logged on to the site.
To bookmark a story, you can simply click on a paragraph in the story. The paragraph will be marked like this:
If you open the same story later, the browser will automatically scroll to the paragraph you’ve bookmarked before, so you can continue reading from there.
Clicking another paragraph within the same story will move the bookmark.
There are also buttons where you can toggle the bookmark for the whole story:
The menu item User->Your Bookmarked Stories will list all stories you’ve currently bookmarked. In this list you can also remove bookmarks by clicking the little x button right of the bookmark:
The percentage number shows the position of the bookmark in the story.