The blue 'Privacy settings' box in the bottom right corner is a new legal requirement under GDPR (General Data Protection Regulation). It can’t be dismissed or hidden as the idea is that it must be easy to access at all times should you wish to change your settings.
Tip: to dismiss Announcement threads, click the cog icon in the right-hand corner of the thread title, then click 'Dismiss'. To save them for later, click the star icon to the right of the cog - they'll stay in your Bookmarks. To dismiss this message, click the X in the corner.
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