Hi, Howard,
Perhaps your other application doesn't conform completely to Windows standards. Adagio does and uses the tab key to move forward to the next field (or you can click in any field) and the shift/tab keys to move backward to the previous field.
The Details 'tab' does remain open and the list of each item being received for this receipt displays in the window. However, as each item being entered is different, the information for each item is entered on a separate New Detail window.
You might want to speak with your Adagio dealer about recommending a 3rd party software that integrates with Adagio to meet your particular needs.
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Regards,
Softrak Tech Support