原文地址：[url]http://bbs.lcdhome.cn/read-htm-tid-380463.html[/url]
我补充几张图片更好理解一些，便于操作。
[attachment=394692]
[attachment=394684]
[attachment=394685]
[attachment=394686]
[attachment=394687]
[attachment=394688]
[attachment=394689]
[attachment=394690]
[attachment=394691]
