A simple time-saving step when entering checks is to enter the default account information directly into the vendor record.
In the vendor record, there is an “Account Information” tab. By entering the checking account and the usual expense account here, it will automatically appear when you select that vendor in Accounts Payable / Maintain Open Invoices.
If the account information needs to be changed from the usual expense account, it can be easily edited in the Open Invoices window.