In the Comments Screen you can edit or delete content found in comments to your posts, and you can mark comments as spam, send comments to the trash, and reply to comments. A number of rules can be defined about who can write comments, and how comments are moderated. These rules are managed via Administration > Settings > Discussion.
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This function calls each of the active widget callbacks in order, which prints the markup for the sidebar. If you have more than one sidebar, you should give this function the name or number of the sidebar you want to print. This function returns true on success and false on failure.