After looking up any item in Director, you can immediately see a total quantity on hand for all stores by looking in the On Hand number in the Other Information section.
Note that this is a combined quantity for all stores currently selected for reporting. See below for instructions on selecting stores.
Clicking on the On Hand number will display Current on Hand Quantities for each selected store.
This window also shows retail and cost for the item at each store.
To control which stores are shown in this area, you will need to click the X stores selected to Receive Changes/For Reporting link at the very bottom of the window.
This will bring up the window pictured on the right. Just check the box for each store you want to see inventory for, then click Done