The PDF format is meant to ensure the formatting of a document is preserved when viewed on different operating systems and devices. If you’re viewing a document on a PC in a dark room, you might want to change the color scheme so the screen is not so bright.
PDF格式旨在确保在不同的操作系统和设备上查看时保留文档的格式。 如果要在暗室中的PC上查看文档，则可能需要更改配色方案，以使屏幕不太亮。
Adobe Acrobat Reader has a special setting just for this purpose, and we’ll show you how to select different color schemes that are more suited for reading in the dark. For example, the Apple Watch User Guide displays with a white background and black and light gray text. But, we’ll change that to look like the image above.
为此，Adobe Acrobat Reader具有特殊的设置，我们将向您展示如何选择更适合在黑暗中阅读的不同配色方案。 例如，《 Apple Watch用户指南》显示带有白色背景以及黑色和浅灰色文本。 但是，我们将其更改为上面的图像。
To change the color scheme, select “Preferences” from the “Edit” menu.
要更改配色方案，请从“编辑”菜单中选择“首选项”。
On the Preferences dialog box, click “Accessibility” in the list of options on the left.
在“首选项”对话框中，单击左侧选项列表中的“可访问性”。
In the Document Colors Options section, check the “Replace Document Colors” box. Then, select the “Use High-Contrast colors” option and select a color scheme from the “High-contrast color combination” drop-down list.
在“文档颜色选项”部分中，选中“替换文档颜色”框。 然后，选择“使用高对比度颜色”选项，然后从“高对比度颜色组合”下拉列表中选择一种配色方案。
Click “OK” to save your changes and close “Preferences” dialog box.
单击“确定”保存更改并关闭“首选项”对话框。
The color scheme changes in the document area. Notice that the Apple logo in our document is not very visible in the Apple Watch User Guide because it was already a dark color. You may find that some darker elements in some documents may be hidden when you invert the colors, depending on what color scheme you select.
配色方案在文档区域中更改。 请注意，我们文档中的Apple徽标在Apple Watch用户指南中不是很明显，因为它已经是深色。 您可能会发现，当您反转颜色时，某些文档中的某些较暗元素可能会被隐藏，具体取决于您选择的颜色方案。
This setting affects all documents you open in Adobe Acrobat Reader, so if you’re reading a document on your PC in a room with plenty of light and you want to display in the default color scheme, uncheck the “Replace Document Colors” box on the Preferences dialog box as described earlier in this article.
此设置会影响您在Adobe Acrobat Reader中打开的所有文档，因此，如果您在光线充足的房间中在PC上阅读文档，并且希望以默认配色显示，请取消选中“替换文档颜色”框。本文前面所述的“首选项”对话框。