To add a file block:
- Click Add Content on the sitemap menu.
- Click a sitemap page either on content dashboard or on the content gathering user interface.
- Click the file block.
- Drag & drop a file from your local machine to file block on a sitemap page.
- Select file manually from your local machine.
- Add file from sitemap file library.
- Add file URL.
- When done hit Save.
To see how your content is displayed please see the following article Can I preview my page after content is added?