Why aren't the navigation keys on my phone functioning?

[AC Question]

navigation keys on phone is not functioning?

i was restarting the phone just now without being aware that suddenly a pop up setting appears. im not sure abput the command but i realised that i touched the 'disable' key and now the phone touch keys are not functioning.

 

[B. Diddy]

Re: navigation keys on phone is not functioning?

Welcome to Android Central! Which phone? Does the touchscreen otherwise respond to everything else?