我的测试用户让我意识到做一个使用教程的视频是很有帮助的。

My user testing made me realise that it would be helpful to have a tutorial video.

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同时，增加了7天使用教程，便于投资者学习利用软件。

At the same time, an increase of 7 days, the use of tutorials for investors to learn to use software.

youdao

Opera的知识库 有大量功能细节和使用教程，有在线帮助和价值29美元的付费支持。

Opera's Knowledge Base has details on these and more features and how to use them, as well as on online help options and premium support for $29.

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