After the cheque run, you are asked "Do you want to print additional forms?". This setting is controlled by the Bank (Edit | Banks | Specifications). You need a specification that says "As per attached" for the cheque advice, and then a regular 8 1/2 x 11 page advice.

Samples of these forms are included with the Adagio Payables sample data (\Softrak\Payables\Samdata).