Home button not visible in K8 note at night

Scaria

Dear K8 community

Recently purchased K8 Note.  After setting up I am facing a problem with Menu Screen icons.  These Three icons at the bottom of the screen (Home-Back-Recently used pages) not showing at night.  Create lot of inconvenience at night to tap again and again to work out.  Also the sequence of icons should be "Back-Home-Recently used pages" from Right side in most of the phones .  Comments and solutions please.