> For the complete documentation index, see [llms.txt](https://docs.emsigner.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.emsigner.com/key-concepts/signature-fields.md).

# Signature Fields

Signature fields define the exact location and type of signature or action required within a document. These fields can be configured for handwritten (drawn), typed, image-based, or certificate-based electronic signatures, as well as initials, checkboxes, or date fields. Signature fields ensure consistency, prevent unauthorized modification, and bind signer intent to a specific document location.