How can I create a story which is shown completely?

In SITEFORUM we call Stories which are shown from top to bottom (not only title and short description) Lead Stories.

You create a Lead Story in the same way as you create any other story. There is only one option to activate while creating the story:

In Step 5 you set the time range. Next to the selection boxes you find a column "Lead Story". Activate respectively this option to make your story to a Lead Story.