When you first open a DPL Model Window, the Decision Tree pane will likely be maximized by default (the Influence Diagram is still present but minimized). You are in a Decision Tree-focused modeling mode. The default modeling mode can be changed within File | Options | General. To switch between pane views when one is maximized, press the Tab key.
A DPL Decision Tree is a graphical representation of the chronology and structure of events in your decision model. The tree consists of nodes (representing decision events and chance events), path endpoints, and connecting branches. Nodes representing decision events (yellow squares) and chance events (green circles) have branches leading from them to other nodes. The branches represent the outcome/alternatives for the node. An endpoint (blue triangle), or leaf node, does not have any branches leading from it.
If you work entirely in an Influence Diagram-focused mode, DPL will build and maintain a symmetric Decision Tree for you (the default tree). Once you modify the default tree it becomes your tree and DPL will not make any more changes to it. If you want the default tree again, select Decision Tree | Model | Default Tree. DPL will warn you that the current decision tree will be deleted. If you select OK, DPL will delete the current decision tree and create a symmetric decision tree from the nodes in the Influence Diagram.
Versions: DPL Professional, DPL Enterprise, DPL Portfolio