PowerShell Requires Chilkat v11.7.0+

A PDF Watermark That Only Appears When Printed

See more PDF Watermark Examples

Demonstrates a watermark that is invisible on screen and appears on paper, which is what a "printed copies are uncontrolled" marking needs. Two approaches can do it: an optional-content layer with layer.view off and layer.print on, which also gives the reader an entry in the layers panel of the viewer (layer.locked stops them switching it), and a Watermark annotation with annotation.view false and annotation.print true. annotation.fixedPrint keeps the printed size and position the same whatever paper it goes on. PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

#  This example requires the Chilkat API to have been previously unlocked.
#  See Global Unlock Sample for sample code.

#  The PDF used in this example is available at two_page_memo.pdf

$pdf = New-Object Chilkat.Pdf
$success = $pdf.LoadFile("qa_data/pdf/two_page_memo.pdf")
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

$json = New-Object Chilkat.JsonObject
$json.UpdateString("type","text")
$json.UpdateString("text","UNCONTROLLED WHEN PRINTED")
$json.UpdateString("id","printonly")

#  As a layer: off on screen, on when printing, and locked so the reader cannot switch it on.
$json.UpdateString("approach","layer")
$json.UpdateString("layer.name","Print marking")
$json.UpdateString("layer.view","off")
$json.UpdateString("layer.print","on")
$json.UpdateBool("layer.locked",$true)

$json.UpdateString("rotation","diagonal")
$json.UpdateString("scale.fit","page")
$json.UpdateNumber("scale.fitPercent","70")
$json.UpdateNumber("opacity","0.3")

$jsonOut = New-Object Chilkat.JsonObject
$success = $pdf.Watermark("add",$json,$jsonOut)
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

$("layer id: " + $jsonOut.StringOf("id") + " pages: " + $jsonOut.StringOf("pages"))

$success = $pdf.WriteFile("qa_output/memo_print_only.pdf")
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

#  The same thing as an annotation instead.
$pdf2 = New-Object Chilkat.Pdf
$success = $pdf2.LoadFile("qa_data/pdf/two_page_memo.pdf")
if ($success -eq $false) {
    $($pdf2.LastErrorText)
    exit
}

$json2 = New-Object Chilkat.JsonObject
$json2.UpdateString("type","text")
$json2.UpdateString("text","UNCONTROLLED WHEN PRINTED")
$json2.UpdateString("id","printonly2")
$json2.UpdateString("approach","annotation")
$json2.UpdateBool("annotation.view",$false)
$json2.UpdateBool("annotation.print",$true)
$json2.UpdateBool("annotation.fixedPrint",$true)
$json2.UpdateString("rotation","diagonal")
$success = $pdf2.Watermark("add",$json2,$jsonOut)
if ($success -eq $false) {
    $($pdf2.LastErrorText)
    exit
}

$("annotation id: " + $jsonOut.StringOf("id"))

#  Sample output:

#  layer id: printonly pages: 1-2
#  annotation id: printonly2