# 1.10 circle

    circle [ item <id> ] [at] <vector> radius <length>
           [ with { <option> } ]

The `circle` command is used to draw circles on multiplot canvases. The coordinates of the circle’s center and its radius are specified. The `with` modifier allows the style of the circle to be specified using similar options to those accepted by the `plot` command. The example

    circle at 2,2 radius 1 with color red fillcolor blue

would draw a red circle of unit radius filled in blue, centered above and to the right of the origin.

All vector graphics objects placed on multiplot canvases receive unique identification numbers which count sequentially from one, and which may be listed using the `list` command. By reference to these numbers, they can be deleted and subsequently restored with the `delete` and `undelete` commands respectively.