This feature was added to the 2.33 release to allow new users to select the journal they would frequently use for the account type. Once set with the F12 key, the prompt as you have discovered will not display again.

Here are three account types and the possible journals one would commonly use:
Accounts Receivable – SI (Sales Invoices)
Account Payable – PI (Purchase Invoices)
– BD (Bank Deposit)
– BP (Bank Payments)
Application databases could contain a variation of the above plus custom journals setup by other users. Using Window > Define Column under the Journal column and setting the pick root to allow specific journals to be selected on prompt give new users the ability to select the proper journal instead of accepting the defaulted journal for that particular account type.

I hope this helps.

Regards to All,