For almost every deal mechanism you select in DealTrack, you will be required to assign at least one item from each of your dimensions to the deal you are creating. This setting is simply labelled Dimensions and will require you to first select a dimension collection and then to click on either a select all items option or a manually select items option.
Included dimensions determine what entities should earn rebate (e.g. which products or product groups or product categories are earning the rebate specified in that deal).
Clicking the select all option will include all current items and any future items that belong to the ‘current items’ collection. For more complex deals however, it is advised that you choose the manually select items option in order to directly select items, configure selection rules and nominate items to be specifically excluded from the particular deal.