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. For rasterized drivers the dx and dy values specified in `plspage` are used to convert from mm to pixels (note the different unit systems used). This dpi aware scaling is not implemented for all drivers yet.

`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 examples 2, 13, 23, and 24.

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