How to logout/logoff from the email account ?

This is not difficult. Go to yahoo or google. There you will get an icon to sign off and use safari to get on to your emails instead of apps. Try not going to yahoo email directly when you want to sign off.

This is simple:

Go to settings and scroll down to mail.

Then click delete account

Sign in woth the new account you want to start using

Well this is the final straw for me really. I will search online how to do a factory restore then this gadget can go back to my wife's office - and stay there.

My wife found it useless for anything productive so gave it to me. I have also found it pretty useless (Bluetooth cannot transfer files? Really? No proper USB? Cannot edit docs without a 365 subscription? etc etc etc etc). I really don't see much use for it really, and find a 3 year old Android tablet vastly more useful and user friendly.

Urgh.