打开 PDFnoted 网站，点击「添加水印」工具 → 拖放或点击选择需加水印的PDF文件。所有处理均在浏览器内完成，原始文件不会上传至任何服务器。
在水印设置面板中，选择「文字水印」→ 输入‘机密’；开启‘平铺模式’；将透明度调至60%–70%，字体选黑体/微软雅黑，字号设为48–64，旋转角度设为-35°～-45°，确保水印覆盖全页且清晰可辨又不遮挡正文。
点击「应用并下载」，PDFnoted即时生成带平铺水印的新PDF。文件自动下载到本地，可立即发送给同事或客户——水印已嵌入每一页，无法通过常规编辑删除。
Go to PDFnoted.com, select the 'Watermark' tool → Drag & drop or click to upload your PDF. Processing happens entirely in your browser—no file leaves your device.
In the watermark panel, choose 'Text Watermark', enter 'Confidential'; enable 'Tiled Mode'; set opacity to 60–70%; use SimHei or Microsoft YaHei font, size 48–64, and rotate -35° to -45° for optimal coverage without obscuring content.
Click 'Apply & Download'. PDFnoted instantly generates a new PDF with embedded tiled watermarks on every page. The file saves locally—ready to share securely. Watermarks are baked-in and non-removable via standard PDF editors.
是的。PDFnoted 的平铺模式默认将水印均匀覆盖文档全部页面，包括空白页和附录页，无需逐页设置。
可以。在水印类型中切换为「图片水印」，上传PNG格式Logo（推荐透明背景、尺寸≥500×500px），启用平铺后同样支持透明度与缩放调节。
可以。PDFnoted 添加的是图层式水印，不影响原文本的可选性、可复制性及后续编辑（如用Adobe Acrobat修改内容），仅视觉上叠加标识。
Yes. PDFnoted’s tiled mode automatically applies the watermark uniformly across all pages—including blank pages and appendices—no manual per-page setup needed.
Yes. Switch to 'Image Watermark', upload a PNG logo (transparent background, ≥500×500 px recommended), then enable tiling—opacity and scale remain fully adjustable.
Yes. PDFnoted adds a non-destructive overlay layer—the original text remains selectable, copyable, and editable in tools like Adobe Acrobat; only the visual watermark is added.