Proper page orientation and tidy margins are vital for professional PDFs—whether for print, design, or e-discovery. With Aspose.PDF.Plugin Optimizer for .NET, you can automate the rotation and cropping of pages in any document, targeting single pages, custom ranges, or full batches.
Introduction
Proper page orientation and tidy margins are vital for professional PDFs—whether for print, design, or e-discovery. With Aspose.PDF.Plugin Optimizer for .NET, you can automate the rotation and cropping of pages in any document, targeting single pages, custom ranges, or full batches.
Rotation Scenarios: Adjusting Page Orientation
- Landscape to Portrait (or vice versa): For mixed-content documents or digital/print alignment
- Selective Rotation: Rotate only certain pages (e.g., diagrams, tables, legal exhibits)
using Aspose.Pdf.Plugins;
string input = "@C:\Docs\mixed.pdf";
string output = "@C:\Docs\rotated.pdf";
var optimizer = new Optimizer();
var rotateOptions = new RotateOptions
{
Rotation = Rotation.on90, // Rotate 90 degrees clockwise
Pages = new[] { 2, 4, 6 } // Rotate only even-numbered pages
};
rotateOptions.AddInput(new FileDataSource(input));
rotateOptions.AddOutput(new FileDataSource(output));
optimizer.Process(rotateOptions);
Cropping Margins: Focus on Content
- Trim whitespace, borders, or scanning artifacts
- Crop to exact dimensions for print or design layouts
var cropOptions = new CropOptions
{
CropBox = new Rectangle(50, 50, 500, 700), // x, y, width, height
Pages = new[] { 1, 2 } // Crop only specific pages
};
cropOptions.AddInput(new FileDataSource(input));
cropOptions.AddOutput(new FileDataSource("@C:\Docs\cropped.pdf"));
optimizer.Process(cropOptions);
Combined Example: Batch Rotation and Cropping
Process multiple PDFs or run both operations sequentially:
string[] pdfFiles = Directory.GetFiles("@C:\Docs\ToProcess", "*.pdf");
each (var file in pdfFiles)
{
// 1. Rotate selected pages
var rotate = new RotateOptions { Rotation = Rotation.on90, Pages = new[] { 1 } };
rotate.AddInput(new FileDataSource(file));
rotate.AddOutput(new FileDataSource(file.Replace(".pdf", "_rotated.pdf")));
optimizer.Process(rotate);
// 2. Crop first page in rotated output
var crop = new CropOptions { CropBox = new Rectangle(30, 30, 400, 600), Pages = new[] { 1 } };
crop.AddInput(new FileDataSource(file.Replace(".pdf", "_rotated.pdf")));
crop.AddOutput(new FileDataSource(file.Replace(".pdf", "_final.pdf")));
optimizer.Process(crop);
}
Use Cases
- Print production: Ensure documents are properly aligned for binding/finishing
- Graphic design: Crop images/diagrams to layout specs
- Document cleanup: Remove margins or rotated scans from bulk imports
Frequently Asked Questions
Q: How do I rotate only certain pages in a document?
A: Use the Pages array in RotateOptions to specify target pages.
Q: Can I crop to exact dimensions or target only some pages?
A: Yes—set CropBox and specify page numbers in CropOptions as shown above.
Q: Can I combine operations? A: Yes—run cropping and rotation sequentially, or batch-process multiple PDFs as needed.
Conclusion
Properly oriented and cropped PDF pages enhance the professional appearance of documents intended for print production, design layouts, or document cleanup workflows. Leveraging Aspose.PDF.Optimizer in .NET simplifies these tasks with robust API features that cater to diverse use cases.
