如何使用预览将多个PDF组合到Mac上的一个？

要将多个PDF合并为一个文件，使用Mac上的Preview即可完成，无需第三方软件，具体步骤如下：1. 用Preview打开需要合并的PDF文件，可通过右键选择“打开方式 > Preview”逐一打开；2. 确保主文档的缩略图侧边栏可见，若无则点击菜单栏“查看 > 缩略图”或按下Command Shift T开启；3. 打开其他PDF文件，在其缩略图侧边栏中点击并拖动页面到主文档的侧边栏中，按需调整插入位置；4. 可通过拖动缩略图重新排列页面顺序，或选中后按Delete键删除不需要的页面；5. 完成后点击“文件 > 保存”或“文件 > 导出”以生成单个PDF文件；提示：也可在Finder中同时选中多个PDF文件，右键选择用Preview打开，再将各文件页面拖入主文档合并，最终保存为一个PDF文件。

Combining multiple PDFs into one on a Mac using Preview is simple and doesn’t require any third-party apps. Here’s how to do it step by step:

Open the PDFs in Preview

First, open the PDF files you want to combine in Preview, which is the default PDF viewer on macOS.

• Locate your first PDF in Finder.
• Right-click (or Control-click) and choose Open With > Preview.
• Repeat for the other PDFs, or just open one and add the rest later.

Use the Thumbnail Sidebar to Merge Pages

Once your main PDF is open in Preview:

• Make sure the thumbnail sidebar is visible. If not, go to the menu bar and click View > Thumbnails (or press Command Shift T).
• This shows small previews of each page on the left side.

Now, open another PDF in a separate Preview window, then:

• Click and drag the thumbnails from that second PDF’s sidebar into the sidebar of your main document.
• Drop them where you want them to appear in the combined file.

You can drag pages from multiple PDFs into one document, and rearrange the order by dragging thumbnails up or down.

Rearrange or Delete Pages (Optional)

After combining, you can:

• Reorder pages by dragging thumbnails.
• Delete unwanted pages by selecting a thumbnail and pressing the Delete key.

Save the Combined PDF

Once you’re happy with the order:

• Go to File > Save (or File > Export if you want to adjust file size or format).
• The result is a single PDF with all your pages in one file.

Tip: If you want to combine many PDFs quickly, you can also:

• Select all the PDFs in Finder.
• Right-click and choose Open With > Preview (this opens them all in separate tabs or windows).
• Then drag pages from each into your main document’s thumbnail pane.

That’s it—no extra software needed. Just drag, drop, and save.

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