Configuring my old router to be used as a wifi extender

[shaneyruegas34]

How do I change my Netgear N600 model no. c3700 to be used as a wifi extender

 

[nigelivey]

What do you think you mean by wifi extender?

 

[BFG-9000]

It's a combination cable modem/wireless router. While you could turn off the DHCP server to make it into a wired AP, there's no chance of turning it into a wireless repeater.