从著名的铸造厂或者字体设计商那里购买字体授权，在纸质书籍设计上司空见惯，但对电子书还是不可能的任务。
Licensing custom fonts from a well-known foundry or font designer, a ubiquitous practice in print book design, is an impossibility for e-books.
这样，用户无需离开设计器就能试验鼠标翻转效果或是在文本域中输入文本时查看字体。
This makes it possible, for example, to try button rollover effects or enter text into a text area to try out its fonts, without ever leaving the designer.
这些设计元素的字体大小通常都要超过36px，在很多情况下，为迎合观众都会使用非常漂亮的字体。
The font size of these design elements often goes beyond 36 pixels, and in many cases quite expensive typefaces are used to reach an audience.
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