Somehow, the text in some of your pages isn't wrapping properly. For instance [here][1] ![screenshot][2] [1]: https://easyeda.com/Doc/Tutorial/new-v-4.1.1.htm [2]: /editor/20170414/58f01637e5860.jpg This is difficult to read. Browsers generally do a good job of text-wrapping (placing line breaks only between words), but I don't know why your pages are doing this.