Used to select general usage element selection, manipulation, and modification tools.
With the exception of Element Selection, the tools in the Main toolbox are also members of a "child" toolbox. When one of the other tools is pointed to and the Data button held down, a drop-down menu opens from which a tool in the child toolbox can be selected. The child toolbox can be "torn off" and floated by choosing Open as ToolBox from the drop-down menu.
When a tool is selected in a child toolbox (attached or floating), the tool automatically becomes the "representative" of the child toolbox in the Main toolbox.
All tools in a toolbox are not always visible by default. To see all tools, right-click in the toolbox and select Show All from the menu.