All item groups are shown to the right of the main window. Only the required items, suppliers and existing purchases with items from the selected group(s) are shown in the overview. No itemle group is selected on first opening the window.

1. To see all item groups, click on the empty top line in the   Item group window.
2. Select an Item group or subgroup in the list by left-clicking or Shift/Ctrl-clicking and left-clicking for multiple selection.
3. In the main window, only the required items belonging to this item group(s) are shown.
4. Only the purchases that contain items in this item group(s) are shown in the list of existing purchases above.
5. In the list of suppliers, only those suppliers are shown who have items of this item group(s) in their range.