FlattenTransparencyOperation DotsPerInch Property. Sets the resolution of generated images. ABCpdf .NET PDF Library. From ABCpdf .net previous page next page DotsPerInch Property Type Default Read Only Description [C#] double [Visual Basic] Double 72.0 No Sets the resolution of generated images. Notes When two complex objects overlap, such as a partially transparent image with a backdrop image, an image representing the overlap is generated to this resolution. Example See the Flatten method. previous page start next page