How do I extend it? - Fluidmaster 400A Toilet Tank Repair Fill Valve

Unplug the power cables of the router and the range extender for 30 seconds. Plug in the router first. Wait for all the lights to be stable then plug in the range extender. Your range extender should now be in synchronized with your router.

Manually configuring a Linksys Wireless-N Range Extender

https://www.google.com/search?q=setup+Linksys+Extender

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1. Plugin your extender in electrical outlet.
2. Place your extender near your router when first time your are setting new extender.
3. Launch any web browser and enter mywifiext.net. The New Extender Setup page displays.
4. In the Password section, type the existing WiFi network password. Default user name is admin and password is password.
   

5. Click continue and a message box displays saying that your extender is connected to the new extender WiFi network
6. Now, you can connect your device to the extender network, go to the WIFI settings and connect to the extender's new network.
7. Netgear EX6100 Setup is successfully completed now place the extender at the desired location and enjoy seamless Connectivity.

I don't think it is possible.For reasons too technical for this forum, the extender does not have the ability to connect to another extender. You could try using an Access Point or router capable of working as an access point as the first extender, then using the RE 1000 to extend from that.

can you now see 2 monitor properties i.e. 1 & 2... then identify running monitor ... if it is 1 then select 2 in properties and set it again to be used as extended desktop... open any application and pull or drag it holding it from title bar to the extended desktop....