打开PDFnoted官网（pdfnoted.com），点击「选择文件」或直接将合同PDF拖入上传区。系统自动加载文档，支持常见加密PDF（需已解锁）。
点击工具栏「电子签名」图标 → 选择「手绘签名」用鼠标/触控笔书写，或「上传签名图」（PNG/JPG格式，建议透明背景）。签名生成后，拖拽至合同指定签署处（如末页甲方栏），可缩放、旋转、微调位置。
确认签名位置无误后，点击右上角「下载」按钮（⬇️图标），PDFnoted将生成含数字痕迹的PDF文件（含时间戳与签名图层），自动下载到本地。该文件可直接发送给对方，符合《电子签名法》基本效力要求。
Visit pdfnoted.com, click 'Choose File' or drag your contract PDF into the upload area. PDFnoted loads it instantly—supports most unlocked PDFs, including password-protected ones (if you enter the correct password).
Click the 'E-Sign' icon in the toolbar → choose 'Draw Signature' (use mouse/touch) or 'Upload Image' (PNG/JPG, transparent background recommended). Once created, drag, resize, rotate, and fine-tune placement—e.g., over the 'Party A' field on the last page.
Once satisfied with placement, click the 'Download' button (⬇️) in the top-right corner. PDFnoted exports a tamper-evident PDF with timestamp and layered signature—ready to email or share. Complies with core legal validity under China’s Electronic Signature Law and global eIDAS principles.
是的。PDFnoted生成的签名属于‘可靠电子签名’范畴：用户身份可控、签名不可篡改、签署过程可追溯。在中国及多数普通法/大陆法国家，满足《电子签名法》第十三条即具同等法律效力。
可以。PDFnoted支持在同一份PDF中添加多个独立签名——每位签署人可分别绘制或上传专属签名，并自由放置于不同页面或位置（如甲方签第2页、乙方签第5页），无需重复上传文件。
可以，但不推荐。PDFnoted签名不锁定文档；若修改文本，原始签名仍保留但可能影响法律可信度。如需修订，建议先保存未签名版，修改后再重新签名。
Yes. PDFnoted creates ‘reliable electronic signatures’: user identity is verified, signatures are tamper-proof, and audit trails exist. In China and most jurisdictions, it meets Article 13 of the Electronic Signature Law—and holds equal legal weight to handwritten signatures.
Yes. You can add multiple distinct signatures on one PDF: each signer draws or uploads their own, then places them independently—e.g., Party A signs page 2, Party B signs page 5—without re-uploading the file.
Technically yes—but not advised. PDFnoted doesn’t lock the PDF post-signing; editing text won’t remove the signature, but may compromise evidentiary integrity. For revisions, save an unsigned copy first, edit, then re-sign.