#### Description:

This attribute selects the functions which are used to draw graphics by the Plot class. If it is zero, then the functions in the graphics interface selected at link-time are used (see the ??link

script). Otherwise, functions registered using astGrfSet are used. In this case, if a function is needed which has not been registered, then the function in the graphics interface selected at link-time is used.

The default is to use the graphics interface

Type:

  Integer (boolean).

#### Applicability

##### Plot

All Plots have this attribute.

##### Plot3D

The Plot3D class ignores this attributes, assuming a value of zero.

#### Notes:

- The value of this attribute is not saved when the Plot is written out through a Channel to an external data store. On re-loading such a Plot using astRead, the attribute will be cleared, resulting in the graphics interface selected at link-time being used.

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