PDF News

Collaboratively Review PDFs with Visible Deletions

June 3, 2025
Highlight proposed deletions with strikethroughs to support legal reviews, editorial revisions, and compliant document workflows.

Strikethrough annotations in a PDF viewer let users mark text for deletion while keeping the original content visible, helping teams review proposed edits in context. This supports clear collaboration without altering the source file and creates an audit trail for legal or editorial review. It enables fully digital, searchable workflows ideal for updating technical documents, refining contracts, or revising marketing content with accuracy and transparency.

Several .NET Winforms components offer strikethrough annotations including:

  • XFINIUM.PDF CROSS PLATFORM EDITION lets you add, customize, render strikethrough annotations in PDFs across Windows, macOS, Linux, and mobile devices.
  • PDFView4NET Windows Forms Edition by O2 Solutions allows you to apply, style, manage strikethrough markups on PDF text, facilitating precise review and tracking.
  • Syncfusion Windows Forms PDF (part of Syncfusion Essential Studio Enterprise) allows you to integrate strikethrough annotation tools, customize styling and improve collaboration.
  • DevExpress WinForms PDF Viewer (part of DevExpress WinForms) lets you insert strikethrough annotations, control opacity, and ensure consistent presentation.

For an in-depth analysis of features and price, visit our comparison of .NET Winforms PDF Viewer components.

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Unify PDF Content with Combined Documents

May 29, 2025
Merge multiple PDF documents to maintain consistent formatting, simplify navigation, reduce storage and improve sharing.

Merging PDFs involves combining two or more separate PDF files into a single cohesive document, preserving the original formatting and quality of each page. This process improves file management by reducing clutter and making it easier to locate and share information, while also minimizing storage overhead. Benefits include consistent headers and footers across pages and simplified collaboration through a single master file for review and annotation. Common use cases include uniting research articles for academic literature reviews, and creating unified project portfolios or client presentations.

Several .NET WPF components offer PDF merging including:

  • LEADTOOLS PDF lets you merge multiple PDF documents programmatically with precise page ordering, robust error handling, and flexible merge settings.
  • IronPDF for .NET allows you to merge PDF files in C# or VB.NET environments, supporting custom bookmarks, compression, and encryption.
  • Syncfusion WPF PDF (part of Syncfusion Essential Studio Enterprise) facilitates merging PDFs with intuitive UI controls and seamless bookmark preservation.
  • Telerik UI PDF for WPF (part of Telerik UI for WPF) lets you merge PDF pages using drag-and-drop and supports configurable headers and high-fidelity rendering.

For an in-depth analysis of features and price, visit our comparison of .NET WPF PDF components.

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Add Clarity and Context to PDF Files

May 22, 2025
Annotations enable users to highlight key sections, provide comments, or suggest edits to PDF documents, ensuring feedback is as clear as possible.

PDF annotation capabilities in PDF components provide powerful tools for users to interact with and enhance digital documents. These features are essential across industries where document review, feedback, and collaboration are critical, such as legal, education, engineering, and publishing. By integrating annotation support, developers enable users to mark up content visually, add commentary, and highlight important information, all without altering the underlying document content. Annotations are typically stored separately from the base file data, ensuring document integrity while allowing flexible interaction.

Common features include:

  • Free Text annotations allow users to insert editable text anywhere on the page, useful for adding clarifications or context.
  • Freehand Draw (Ink Annotations) let users sketch directly onto the page for informal notes or diagrammatic feedback.
  • Highlight Text annotations help draw attention to key passages by applying a translucent overlay.
  • Lines annotations provide a precise way to mark connections or callouts, often used in technical reviews.
  • Rectangles annotations offer a clean method to emphasize or outline specific areas of interest.
  • Stamp annotations enable users to apply predefined or custom graphical markers, such as approval seals or confidentiality warnings.
  • Sticky Note annotations allow users to attach small pop-up comments to any part of the document for easy reference.
  • Strikethrough annotations visually indicate content that may need deletion or reconsideration.
  • Underline Text annotations subtly emphasize text without obscuring it.

For an in-depth analysis of features and price, visit our .NET PDF components comparison.

Explore .NET PDF Annotation Features

Extend PDF Capabilities in .NET 9 Apps

May 22, 2025
PDF Xpansion SDK 17.1.3 unlocks advanced PDF processing in modern apps by utilizing the performance enhancements of .NET 9.

The PDF Xpansion SDK from Soft Xpansion is a powerful development toolkit for integrating advanced PDF and electronic document processing into desktop, server, and mobile applications. It supports creating, editing, converting, displaying, and printing PDF files, along with handling related formats like XPS and OpenXPS. The SDK complies with ISO PDF standards and offers robust features for digital signatures, form processing, text extraction, and document security. It also includes specialized capabilities for e-invoicing, supporting formats such as ZUGFeRD and Factur-X, and provides PDF viewer functionality for seamless document display. This makes it an ideal solution for automating document workflows and ensuring regulatory compliance in enterprise environments.

The PDF Xpansion SDK 17.1.3 update introduces official support for both .NET 8 and the latest .NET 9, enabling developers to integrate advanced PDF functionality into modern applications while taking full advantage of the newest runtime optimizations and language enhancements. This ensures higher performance, improved scalability, and stronger security for document processing solutions. With support for .NET 9, development teams can leverage cutting-edge features such as improved Just-In-Time (JIT) and native Ahead-Of-Time (AOT) compilation, resulting in faster application startup times and reduced memory consumption. This update helps future-proof projects and supports the latest trends in application development.

PDF Xpansion SDK products are licensed per company location where developers use the SDKs. Optional Add-Ons are available which require ownership of SDK site licenses. Maintenance Subscription is available providing product updates (error corrections) and support services. See the product license pages for full details:

Learn more about PDF Xpansion SDK on our product pages:

Easily Add Pages to PDF Documents

May 16, 2025
Enable users to expand documents effortlessly with tools for inserting pages anywhere in a PDF file, without leaving the viewer.

Adding a page to a PDF file is a key feature in modern PDF viewer components, enabling users to dynamically insert new content into existing documents. This capability is particularly useful in web applications that require real-time document editing or automated PDF generation, such as form processing, report building, or multi-user collaboration platforms.

Several ASP.NET Core PDF viewer controls offer the ability to add pages to a PDF file including:

  • Telerik UI PDF for ASP.NET Core (part of Telerik UI for ASP.NET Core) allows developers to insert a new page at any location.
  • Document Solutions for PDF by MESCIUS enables the addition of new pages with configurable size and orientation, making it ideal for dynamic document creation.
  • Syncfusion ASP.NET Core PDF (part of Syncfusion Essential Studio Enterprise) provides methods to add blank pages or clone existing ones.

For an in-depth analysis of features and price, visit our ASP.NET Core PDF viewer controls comparison.

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