The project tree displays the following information:

Targets

Add a new Target by right clicking any Target and choosing "Add Target..."

To reorder Targets:

Project Global Scripts

To open a Project Global Script:

Variables

To add a variable, right click Variables and select "Add Variable"

To edit a variable, right click it and select "Edit Variable", or double click it.

To open the Edit Variables dialogue, select "Edit Variables" from any variable's context menu, or click the Toolbar icon.