plschr: Set character size

`plschr`: Set character size
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#### `plschr`: Set character size

`plschr (` | def,
| scale`)`;

This sets up the size of all subsequent characters drawn. The actual height of a character is the product of the default character size and a scaling factor.

`def` (`PLFLT`, input)

  The default height of a character in millimeters, should be set to zero if the default height is to remain unchanged.

`scale` (`PLFLT`, input)

  Scale factor to be applied to default to get actual character height.

Redacted form: `plschr(def, scale)`

This function is used in example 2,13,23,24.

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