您将需要一些基本知识，如层、参考线、向量和图层蒙版、笔刷、钢笔工具，和文字工具（字符和段落）。

You will need some basic knowledge about Layers, Guides, Vector and Layer Masks, Brushes, the Pen Tool, and working with Typography (Character and Paragraphs).

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打开动画窗口。第一帧将两个文字的图层都隐藏在蒙版后面，将手机信号线的透明度减少到50%。

Open animation window. For the first frame let the both text layers be hidden behind their masks. Reduce the opacity of radial waves to 50%.

youdao

第一帧将两个文字的图层都隐藏在蒙版后面，将手机信号线的透明度减少到50%。

For the first frame let the both text layers be hidden behind their masks. Reduce the opacity of radial waves to 50%.

youdao

第一帧将两个文字的图层都隐藏在蒙版后面，将手机信号线的透明度减少到50%。

For the first frame let the both text layers be hidden behind their masks. Reduce the opacity of radial waves to 50%.

youdao