You can view more than one SKU at a time on both the Inventory and Sales dashboards. In addition, some individual KPI's will allow you to select multiple SKU's for the metric. The Product Overview, Supplier Scorecard, OTIF Scorecard, and Replenishment dashboards do not allow multiple SKU's to be selected.
How do I select multiple SKU's?
To select multiple SKU's on the Sales or Inventory dashboards, simply use the Products filter and check multiple products.