Article in English: If you're recording a full-screen program, you probably don't have to worry about this, but if you are giving tutorials involving multiple windows you'll want to ensure that your desktop isn't distracting.  Move all of the icons off of your desktop. Either put them in a folder or move them to a second monitor. You can move them all back when you're done recording. Close any unrelated windows. Make sure any chat programs, emails, browsers, and anything else unrelated is closed and not drawing attention. Change your wallpaper to something muted. If you have a colorful, busy wallpaper, or it's images of your family, set it to something neutral for the recording. Write a basic outline of your presentation, with notes on when to switch windows and important tips to remember. This will help ensure that you get all of your information across, and help you to avoid "ummms" and "uhhhs".  During the script writing process, practice the presentation to make sure that it flows well. Some people don't need scripts, others do. Get familiar with the process and do what works best for your style of presenting. Viewers will get the most out of your Camtasia presentation if it is narrated. In order to record the best-sounding audio possible, you're going to want a decent microphone that connects to your computer via USB.  Consider the acoustical environment of where you are recording. A large room with big empty walls will create an echo like sound. Background noise will distract the viewer.  You can also use a webcam to capture your face during a presentation as well.

Summary in Chinese:
清理桌面。 打草稿或撰写提纲。 插上质量比较好的麦克风。