Facebook has begun rolling out a feature called "downvote" that lets users register a negative reaction to comments on the social networking platform but it is not the "dislike" button users have long desired. Clicking the "downvote" button hides the comment for the user who taps it, then asks the user to say whether the comment was "offensive", "misleading", or "off topic". Facebook confirmed the test in February this year. Now, it appears the feature is rolling out to a greater number of users. The Reddit-style 'downvote' button aims to improve the quality of discourse on the platform," The Next Web reported on Monday.