Sometimes, when changing the views in the Report Editor, certain panels (such as the Report Tree Panel or Data Tree Panel) may be minimized. 

  • If you can't see these panels, it is important to first make sure they're enabled in the Report Editor "View" tab.

  • If the panels are enabled, but still not visible, they may be minimized. From the Report Editor, find the 4 horizontal dots towards the left- or right-hand size of the Report Design Workspace, then drag the panel to make it larger.

Below is an image showing the Report Editor with all of the panels displayed: