How Does Apple's Preview Implement Autofill for Placing Form Fields in PDFs

I’m currently delving into the autofill feature in Apple’s Preview app for creating fillable PDF forms. I’m curious about the technical implementation behind this feature.

Does anyone know how Apple has solved the problem of detecting and placing form fields in PDFs?

  • What algorithms or techniques are they using for field detection and placement?
  • How effective is this approach compared to other tools you’ve used?

I’m particularly interested in understanding the technical side of things and any insights into the performance and accuracy of this solution. Any detailed explanations or references to relevant resources would be greatly appreciated!

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