访问 PDFnoted 官网 → 点击「添加水印」→ 拖入或点击上传需保护的PDF文件（支持最多200MB）。系统自动解析页面，进入水印编辑界面。
点击「图片水印」→ 上传PNG格式Logo（推荐带透明背景）→ 在右侧面板中：① 调整‘透明度’至30%–60%（防遮挡又保可见）；② 开启‘平铺’开关，使Logo均匀覆盖全页；③ 可选旋转角度（建议15°–30°提升辨识度与防篡改性）。
实时预览左下角水印效果——确认位置、密度与清晰度。点击「应用到全部页面」，PDFnoted将自动为每页叠加一致水印（含页眉页脚区域），保留原始排版与超链接。
点击「下载PDF」→ 获取已嵌入水印的新文件。建议用Adobe Acrobat或浏览器打开，放大查看Logo是否平滑平铺、无锯齿，且文字/图表内容仍清晰可读——这表明透明度与尺寸设置恰到好处。
Go to PDFnoted.com → Click ‘Add Watermark’ → Drag & drop or select your PDF file (up to 200MB). PDFnoted instantly parses all pages and opens the watermark editor.
Click ‘Image Watermark’ → Upload a PNG logo (transparent background recommended) → In the right panel: ① Set ‘Opacity’ to 30%–60% (visible but non-obstructive); ② Enable ‘Tile’ to repeat logo across entire page; ③ Optionally rotate (15°–30° improves recognition and tamper resistance).
Preview live in the bottom-left corner—verify position, density, and clarity. Click ‘Apply to All Pages’; PDFnoted overlays the watermark uniformly on every page (including header/footer zones), preserving original layout and hyperlinks.
Click ‘Download PDF’ → Save the watermarked version. Open it in Adobe Acrobat or Chrome, zoom in to verify smooth tiling (no pixelation) and readability of text/graphics—confirming optimal opacity and sizing.
不能。PDFnoted将水印作为不可选中的图形层嵌入PDF底层，不依赖文本图层或注释，常规复制、截图或OCR均无法剥离。仅高级PDF编辑器（如Adobe Pro）可手动删除，但会明显破坏文档结构。
完全支持。只要Logo图片本身含中文（如公司名‘创想设计’），PDFnoted会原样渲染。建议使用高清PNG（≥300dpi），避免缩放失真；文字边缘保持锐利，确保水印专业可信。
可以。在PDFnoted水印编辑界面，取消勾选‘应用到全部页面’，改选‘指定页面’→ 输入‘1’→ 点击确认。适合仅在封面/标题页展示品牌Logo，内页保持干净。
No. PDFnoted embeds the watermark as a non-selectable graphical layer deep in the PDF structure—not as text or annotation. Standard copy/paste, screenshots, or OCR cannot extract it. Only advanced tools like Adobe Acrobat Pro can remove it manually—but doing so visibly corrupts layout integrity.
Yes, fully supported. If your logo image contains Chinese characters (e.g., ‘创想设计’), PDFnoted renders them faithfully. Use high-res PNG (≥300 DPI) to prevent scaling blur; keep text edges crisp for professional credibility.
Yes. In the watermark editor, uncheck ‘Apply to All Pages’, then choose ‘Specific Pages’ → enter ‘1’ → confirm. Ideal for branding the cover/title page only, keeping inner pages clean and distraction-free.