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- turtle --Command, one input. Abbreviation: tur
- The input is the name of a turtle. You can only control one turtle at
- a time, so using this command a second time releases the turtle previ-
- ously selected. The names of floor turtles are numbers like 0 and 1.
- If you are using a graphics display terminal (not just a text display
- trminal), you can control the display turtle by using the word display
- (or the abbreviation dpy) as the turtle name. (As usual, the word
- must be preceded by a quotation mark.) If you use a graphics primi-
- tive without selecting a turtle, Logo assumes that you want to use the
- display turtle. But once you select a floor turtle, you must say tur-
- tle "display explicitly to switch to the display.
-
- The word off as input to the turtle command releases a floor turtle,
- if you have one, or turns off the graphics display if you have been
- using the display turtle. This also happens when you leave Logo.
-