It can be pretty frustrating having gotten excited about a free or cheap watermarking plugin only to find out it destroys your fancy PDF file when you use it. Most WordPress PDF plugins use outdated libraries like FPDF or TCPDF. When these plugins ‘stamp’ a watermark, they flatten the file, permanently destroying the layers your customers need for sewing patterns or blueprints, brochures, maps, etc. What we typically hear from users is:
My layers are gone!
Related to the same issue, we also hear:
My forms don’t work! and My links don’t work!
We get it, this sucks. The feature just doesn’t exist at a free/cheap level1.
But don’t give up yet! The solution might cost more, but your PDF files are worth it.
The missing piece to being able to successfully watermark and/or password your layered PDF without data loss is adding SetaPDF-Stamper to PDF Ink.
While basic plugins recreate the PDF from scratch (losing metadata and layers), SetaPDF-Stamper modifies the existing cross-reference table of the file. This allows us to inject a watermark or password as a new object without touching the existing Layer tree, forms or other advanced PDF features.
Layer Integrity (OCGs) is Non-Negotiable for Your Business
PDF layers, also known as Optional Content Groups (OCGs), enable users to create documents with multiple layers of content that can be individually viewed or hidden. This functionality is akin to layers in graphic design software, where different elements can be manipulated independently. Each layer can contain text, images, graphics, or annotations, allowing for a more organized and flexible presentation of information.
Typical Uses of PDF Layers
PDFs with layers are particularly useful in various fields, including:
1. Sewing Patterns
One of the most common applications of layered PDFs is in digital sewing patterns. Designers can create intricate patterns that include multiple sizes, styles, and instructions on separate layers. This allows users to easily select and print only the layers they need, reducing confusion and waste. For instance, a sewing pattern might have layers for different sizes, fabric types, and cutting instructions, enabling users to customize their experience.
2. Architectural and Engineering Drawings
In architecture and engineering, layered PDFs are invaluable for presenting complex designs. Different layers can represent various aspects of a project, such as electrical layouts, plumbing, structural elements, and landscaping. This organization allows stakeholders to focus on specific components without being overwhelmed by the entire project’s details.
3. Maps and Geographic Information Systems (GIS)
Layered PDFs are also widely used in mapping and GIS applications. Users can toggle different layers to view various data sets, such as topography, zoning, or land use. This functionality is essential for urban planning, environmental studies, and navigation, as it allows for a comprehensive understanding of geographic information.
4. Graphic Design and Marketing Materials
Graphic designers often use layered PDFs to create marketing materials, brochures, and presentations. Layers can separate text, images, and backgrounds, making it easier to edit and update designs without starting from scratch. This flexibility is crucial in fast-paced marketing environments where changes are frequent.
Clearly–when it comes to adding watermarks, barcodes, or passwords to PDF files, it’s vital to still retain the integrity of the layers for user experience, and design and information integrity.
Retaining Layer Functionality with PDF Ink
PDF Ink is designed to be up-gradable and work with the only PHP PDF library capable of handling advanced PDF features: SetaPDF. We understand this price tier is a jump but reassure you that this is the price of taking very good care of your precious files. To make it easier, we have partnered with SetaSign so the purchase of PDF Ink entitles you to 20% off the purchase of a SetaPDF-Stamper license. Installation is a matter of moving one file folder inside another file folder using FTP/SSH. Most people find it very easy. If not, we are here to help you.
Don’t sacrifice the power of layered PDFs in order to add a watermark or password — upgrade to PDF Ink!
- Actually, link preservation does exist at the cheap level using WooCommerce/EDD, JavaScript and a insecure redirect-type download.. ↩︎