3.3 The procedure editor

There are three ways to open the editor:

• Enter ed on the command line at the top of the screen. The editor will then open to show all the procedures already defined. If you only want to edit specific procedures, enter:
  
  ed [procedure_1 procedure_2 …]
• Press the Editor button on the main screen.
• Use the keyboard shortcut Alt+E.

These are the different buttons that you will find in the editor:

	Save the changes made in the editor and then close it. It is this button that you have to press each time you want to apply newly entered operations. If you prefer, you can use the keyboard shortcut ALT+Q.
	Close the editor without saving any of the changes made there. You can also use the shortcut ALT+C.
	Print the contents of the editor.
	Copy the selected text to the clipboard.
	Cut the selected text to the clipboard.
	Paste the selected text from the clipboard.
	Open a Replace/Find Dialog Box for the procedure Editor.

At the bottom of the editor, a text field allows the user to define a main command. This command is the general instruction that launches the program. It can be accessed with the “play” button from the main window’s tool bar. This command is saved and then restored when the editor and all its content are recorded in a Logo format file (.lgo)



IMPORTANT :

• Note that clicking on the close button (x) in the window titlebar will have no effect! Only the two main buttons will allow you to quit the editor.
• To delete one or more unwanted procedures, use the primitives er and erall, or use in the menu bar, Tools→ Procedure Eraser.