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 RipUnit
 Get/set X/Y unit
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 Syntax

    RipUnit([<nNewUnit>]) -> nOldUnit

 Parameters

    <nNewUnit> is the new number of high-res pixels per RIP unit.

 Returns

    Old number of pixels per RIP unit.  The default value of RipUnit() is 1
    (1 unit = 1 pixel = 1/200").

 Example

    // To measure in inches:
    RipUnit(200)

    // To measure in points (72 points = 1"):
    RipUnit(200/72)

    // To measure in centimeters: (2.54 cm = 1"):
    RipUnit(200/2.54)