Sometimes you may need to transfer money between bank accounts in your company, or for example, you withdraw cash to use for petty cash. To record this you can use the Bank Transfer option.
These steps are for bank accounts of the same currency. It's a different process, if you need to transfer money between bank accounts of a different currency. For example, a Sterling (£) account to a Dollar ($) account.
If you've already made the transfer and you've made a mistake, don't worry, you can edit or delete the transfer as required.