Once again thank you all for your responces.
Privacy2 you hit it on the head.
I had been in the shortcuts section for the general preferences and was looking there but had not looked at the one in the terminal which you all call gnome Terminal.
So just looked and sure enough you where right .
Have changed it to ctrl++ now all all is well.
Now I can add a user.
A quick extra questian for you all, is there a youtuber any of you all recomend for me to learn more about pureOS as I have noticed that the Unbuntu vids don’t match this OS ?