[GNC] Preferences: editing transactions

[Alex]

Hi All

In the last week I must have answered a question incorrectly.

For as long as I can remember if I edited a saved transaction gnucash 
would ask whether I wanted it to remember the answer for this session 
only or forever.  At some stage I must have answered to remember the 
answer forever. So now gnucash never asks the question.

How do I, easily, revert to the default position? I've looked through 
preferences but couldn't spot anything obvious.

I'm a linux user.

Alex