`plsdidev`: Set parameters that define current device-space window
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#### `plsdidev`: Set parameters that define current device-space window

`plsdidev (` | mar ,
| aspect ,
| jx ,
| jy `)`;

Set relative margin width, aspect ratio, and relative justification that define current device-space window. If you want to just use the previous value for any of these, just pass in the magic value PL_NOTSET. It is unlikely that one should ever need to change the aspect ratio but it's in there for completeness. If `plsdidev` is not called the default values of ``mar`` , ``jx`` , and ``jy`` are all 0. ``aspect`` is set to a device-specific value.

`mar` (``PLFLT``, input)

  Relative margin width.

`aspect` (``PLFLT``, input)

  Aspect ratio.

`jx` (``PLFLT``, input)

  Relative justification in x. Value must lie in the range -0.5 to 0.5.

`jy` (``PLFLT``, input)

  Relative justification in y. Value must lie in the range -0.5 to 0.5.

Redacted form: `plsdidev(mar, aspect, jx, jy)`

This function is used in example 31.

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