The main menu and toolbar contain buttons and menu entries used for common tasks: file operations, document editing, window management and execution of simulations.  Note in particular the “Run” button: this button is used to initiate execution of a simulation or start of a script, depending on what document window has focus when the button is pressed.  This will be discussed in more detail in sections to follow.  The search window and other menu and toolbar options provide similar functionality to their counterparts in other common desktop applications.