initial amount in accounts (1.4 to 1.5.95)

[François Jan]

Hi,

I just installed gnucash 1.5.95 and I remarked when creating a new
account that we could choose an initial amount. I would like to set one
for my bank account that I created in gnucash 1.4 where this possibility
didn't exist. What I did at the time was to put a deposit with no
transfer account. So my question is 

1) Is it possible to set the initial amount in an existing account ?
2) if not, how can I create a new account and transfer my old one
without loosing the transactions involving the last one ?

Thanksfully yours,
Prunille