[guru don]

I updated my Lumia to denim..but it doesn't give navigation bar hide option...what I have to do for this option..

[Kaushik Banerjee]

which model are you using?
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[guru don]

Lumia 530

[Asskickulater]

you won't get that option, as your screen is actually bigger than hardware button phones to compensate, basically, if you use that feature, all you would do is make a black bar on the top/bottom as no app supports that resolution, phones like the htc one m8 for windows have it because that phone wasn't made with the software buttons in mind, thus, having the button bar overlaps screen space.