访问 PDFnoted 网站（或打开桌面版），点击「上传文件」，选择含批注/表单的 PDF。支持拖拽上传，自动识别可编辑区域（如文本框、复选框、手写签名）。确保文档已保存最新修改。
在右侧工具栏找到「高级操作」→「扁平化（Flatten）」按钮。勾选选项：✅ 压平所有批注（高亮/下划线/文本注释）、✅ 压平交互式表单字段、✅ 删除隐藏图层。PDFnoted 默认保留原始视觉效果，不压缩图像质量。
点击「开始扁平化」，PDFnoted 将逐页渲染并嵌入所有内容。完成后点击「下载」，获得新文件——此时所有批注变为静态图像/矢量图形，表单字段不可点击、不可删除。建议重命名如 'Contract_v2_Flattened.pdf' 以示定稿。
Go to PDFnoted (web or desktop), click 'Upload File', and select your annotated or form-filled PDF. Drag-and-drop is supported. PDFnoted auto-detects editable fields (text boxes, checkboxes, ink signatures). Make sure all edits are saved before uploading.
In the right sidebar, go to 'Advanced Actions' → click 'Flatten'. Check: ✅ Flatten all annotations (highlight, underline, text notes), ✅ Flatten interactive form fields, ✅ Remove hidden layers. PDFnoted preserves visual fidelity and does not downsample images.
Click 'Start Flattening'. PDFnoted renders each page and bakes annotations/forms into static vector or raster content. Once done, click 'Download'. The output file has zero editable fields—no more accidental changes. Rename it clearly, e.g., 'Invoice_Final_Flattened.pdf'.
不能。扁平化是不可逆操作——所有批注、表单控件、注释均被转换为页面底层内容（类似打印效果），无法再选中、删除或修改。请务必先备份原始 PDF。
不会。PDFnoted 采用无损矢量嵌入技术，手写签名、高亮色块、字体均按原始分辨率保留。实测 A4 文档在 300 DPI 下输出仍保持锐利边缘与准确色彩。
通常因字段未正确「提交」或处于「未填写」状态。PDFnoted 只压平已输入值的字段；空文本框、未勾选的复选框默认不渲染。请先手动填写/勾选全部必要项，再执行扁平化。
No. Flattening is irreversible: annotations, form fields, and comments become part of the page’s static content (like a printed page). They cannot be selected, edited, or removed. Always keep a backup of your original editable PDF.
No. PDFnoted uses lossless vector embedding—handwritten signatures, highlights, and fonts retain original resolution and color accuracy. Tested on A4 docs at 300 DPI: edges stay sharp, colors remain true.
This usually happens when fields aren’t properly 'committed' or remain blank. PDFnoted only flattens fields with entered values—empty text boxes or unchecked checkboxes won’t render. Fill in or check all required fields first, then flatten.