Connections probles

yes i am connected to the internet.. but still unable to edit connections to change my IPv4 from to 10.10.10.10
That is the main challenge that i have

Hi tommy. I tried to edit the connections using the "edit connections " option but still did not display more options to do so.
I want to try the second method which is to edit the file/etc/network/interface but i cannot get the location to add the below lines:

auto eth1
iface eth1 inet static
address 192.168.1.1
hardware-irq-coalesce-rx-usecs 0

Where do i get that location to add that line