How to enable half circle swipe option in one plus one mobile phone?

[AC Question]

Friends, I need your help to enable an option in one plus one mobile. Until yesterday the below mentioned option there in my mobile, however today it's not working. ONE PLUS ONE - IN HOME PAGE -->BOTTOM LEFT END OR BOTTOM RIGHT END, IF WE SWIPE--> A HALF WHEEL OPTION WILL COME, BY USING IT WE COULD ACCESS VARIOUS MENUS LIKE WHATS APP, SCREEN SHOT, SCREEN CAST ETC.... But today it's not coming. Appreciate if anybody could assist me to enable this option again in my one plus one mobile.
Thanks in advance,
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