Home › Community Forums › Arc › Smart Home › What is the circle with the X in the upper right-hand corner? This topic contains 0 replies, has 1 voice, and was last updated by Tabitha Davila 3 months, 3 weeks ago. Author Posts May 21, 2019 at 7:45 pm #6576 Tabitha DavilaKeymaster Selecting that icon will allow you to kill all background running applications as well clear the cache memory with one click of a button. This topic was modified 3 months, 3 weeks ago by Tabitha Davila. This topic was modified 3 months, 3 weeks ago by Tabitha Davila. Author Posts You must be logged in to reply to this topic.