当您将屏幕截图添加到Microsoft Office文档并对其进行裁剪时，很可能不会进一步考虑未使用的部分，但您是否知道这些部分仍然存在，并且如果它们包含敏感信息，可能会带来安全风险？今天的超级用户问答帮助一位忧心忡忡的读者只保留了所需的部分截图，而永久性地去掉了其余的截图。

今天的问答环节是由SuperUser提供的，SuperUser是Stack Exchange的一个分支，是一个由社区驱动的问答网站分组。

问题

超级用户读者user462760想知道如何阻止Microsoft Office在文档中保留截图中未使用的部分：

I made a worrying discovery that after cropping a screenshot in Word, PowerPoint, and likely other Microsoft Office programs, the unused parts of cropped screenshots are retained. This has made me fairly paranoid as I frequently take screenshots and crop them to show the relevant piece of information before sending the documents off to others.

I had assumed that when I saved a document, the unused porti*** of cropped images were discarded, but looking at work from years ago, I can still uncrop the unused parts of the images to view the original screenshots in their entirety.

Is there a way to disable this? This seems like a ridiculous security flaw.

有没有办法阻止Microsoft Office在文档中保留截图中未使用的部分？

答案

超级用户贡献者Steven为我们提供了答案：

Delete Cropped Areas of a Picture

Even after you crop parts of a picture, the cropped parts remain as part of the picture file. You can reduce the file size by removing the croppings from the picture file. It is also a good idea to do this to help prevent other people from viewing the parts of the picture that you have removed.

Important: This cannot be undone. Therefore, you should only do this after you are sure that you have made all the crops and changes that you want.

1. Click the picture or pictures that you want to discard unwanted information from.

2. Under Picture Tools, on the Format tab, in the Adjust group, click Compress Pictures.

Note: If you do not see the Picture Tools and Format tabs, make sure that you selected a picture. You might have to double-click the picture to select it and open the Format tab.

3. Under Compression Opti***, select the Delete cropped areas of pictures check box. To remove croppings for the selected picture or pictures only and not all of the pictures in the file, select the Apply only to this picture check box.

Tip: For more information about reducing the file size of the pictures and compressing pictures, see Reduce the file size of a picture.

Source: Delete cropped areas of picture (Crop a picture or a shape with a picture fill) – Microsoft

有什么要补充的解释吗？在评论中发出声音。想从其他精通技术的Stack Exchange用户那里了解更多答案吗？在这里查看完整的讨论主题。