~~NOTOC~~

====== 放大与缩小 ======

==== 白板的放大缩小 ====

<grid>
<col sm="6" md="7">
{{ :tv:motion:1_whiteboardscale.mp4?16x9 |}}
</col>
<col sm="0" md="1"></col>
<col sm="6" md="4">
白板缩放：\\
每次放大或缩小均用时200ms，差值使用Quart.easeOut\\
</col>
</grid>