对于打印机，我们常常以每英寸点数指出分辨率。

With printers, we often indicate a resolution in dots per inch.

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例如，对于显示图表或其他图形的控件，可能希望使用每英寸点数(DPI)缩放，以便该控件始终占据一定百分比的屏幕。

For example, you may want to use dots per inch (DPI) scaling on a control displaying a chart or other graphic so that it always occupies a certain percentage of the screen.

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要做到这一点，首先需要知道你的电脑显示分辨率(每英寸的点数)。例如我的是113.21。你可以用这个公式计算出你的分辨率。

To do this, you first need to tell Photoshop the dpi (dots per inch) of your computer display. Mine, for example, is 113.21. You can figure out yours with this handy.

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