In Reportz dashboards, you have the option to merge widgets in order to show and combine data in one graph.
You can do this by simply clicking on the Edit button located on top of the desired widget.
On the menu on the right, you'll get a list of all the widgets from that dashboard that can be merged with the desired widget. Check the boxes, click on submit and your merged widget is finished!
You can only merge widgets from the same source if they all share the same dimension (for Google Analytics, Webmasters, My Business, Adwords, Rankranger and Facebook Ads). However, the widgets from different sources that CAN be merged, mustn't have any dimension (for Google Webmasters, Analytics and Adwords).