I don't have enough experience with doing this to say for sure - maybe Acrobat just ignores z-ordering when it processing selection gestures and/or text hi-lighting - but I kind of think the z-order is important here (Acrobat will certainly allow you to find text if it is below the image - but will it hi-light the found text?).
 
- K
 
----------------------- Original Message -----------------------
  
From: Leonard Rosenthol <[EMAIL PROTECTED]>
To: Post all your questions about iText here <[email protected]>
Cc: 
Date: Mon, 24 Nov 2008 20:09:35 +0100
Subject: Re: [iText-questions] itextsharp for reproduce PDF searchable form TIFF image
  
Actually, below the image is fine for invisible text....Depends on whether you only want searching _OR_ you also want copy...

Leonard

On Nov 24, 2008, at 7:03 PM, Kevin Day wrote:

I believe that there is a font rendering mode that renders the font invisibly. 
 
 
Section 9.3.6 - Table 106 - Mode = 3
 
Not sure if iText supports that rendering mode, but that would be far preferable than messing with Z-order and font color.
 
If you do use that rendering mode, then you want the text to appear *above* the image in the z-order.
 
- K
 
----------------------- Original Message -----------------------
  
From: "Fabrizio Accatino" <[EMAIL PROTECTED]>
To: "Post all your questions about iText here" <[email protected]>
Cc: 
Date: Mon, 24 Nov 2008 18:23:43 +0100
Subject: Re: [iText-questions] itextsharp for reproduce PDF searchable form TIFF image
  
Hello,

swap Step 4.1 with Step 4.2.  You must place the text, than place the tif image. 

fabrizio


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