View Scale

VSCA controls the scale of the VIEW contents. The scale will normally be set automatically to a value which ensures that the VIEW contents fit comfortably within the VIEW boundary (see the AUTO command), but can be changed if necessary, for example,

VSCA 0.05

The larger the VSCA value, the larger are the displayed objects.

VIEW scale may be expressed in terms of a ratio using the VRAT (VIEW Ratio) attribute, for example:

VRAT 1 TO 75

VRAT 1/16in TO 1ft

Two positive values have to be specified but the TO may be omitted. Setting VRAT will cause the existing VIEW scale (VSCA attribute) to be recalculated. Setting VSCA directly causes VRAT to be unset. The AUTO command calculates and sets VSCA directly so this will also cause VRAT to be unset.

Care should be taken when changing VSCA, as it is easy to move the VIEW contents over the VIEW frame. The AUTO command takes the ONPOS value into consideration when it calculates the VSCALE.