Thanks very useful advice, except I have already looked there.
PiBoSo has hidden the setting so that people can't find it, he is such a troll :| :| :| :| :| :| :| :|
Try
settings ->
Input 2 ( literally the second page ).
Just so you don't get lost,
left side of your page, third from the bottom, you will see an option called tuck, re assign that button, press done.