The Hand is a general-purpose editing tool. You'll use it to select, move, open, and edit building blocks and objects. You'll also use it to manipulate Sub-model and Space Compression spaces on the Map/Model level, and to select items on the Equations level. In accomplishing these tasks, the tip of the Hand's index finger is the "hot spot."
Because of its general utility, the Hand is the default selection from among the palette elements. After you have clicked on the diagram while using any of the building blocks, tools, or objects, the software will revert you to the use of the Hand.
Helpful Hint: By depressing-and-holding the alt key (Windows) or option key (Macintosh) after using a particular building block, tool, or object, you can re-use it without re-selecting it from the palette.
Helpful Hint: To multiple-select items, either drag-select or shift-click. Your Windows or Macintosh manual provides details on selection techniques.