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剪映APP“教学辅助课件”:编辑选中一段主轨素材,在剪辑的二级菜单中有一个“编辑”工具,可以用来裁剪图片、调整构图等;点击进入编辑工具,有“旋转”、“镜像”、“调整大小”三个选项;2:在“旋转”中,按住控制点左右移动,可以旋转画面,起到矫正画面歪斜等作用;在“裁剪比例”中,可以选择不同长宽比的裁剪框,对素材进行裁剪,达到调整构图等目的,这段素材的长宽比也相应改变;第一个选项“自由裁剪”,意味着裁剪框长宽比没有固定限制;点击某个比例的裁剪框,即在预览区显示,裁剪框内的内容,是最终被保留的内容,裁剪框外的内容将被裁掉;手指按住屏幕上下左右拖动,可以改变裁剪框中的内容、位置信息等;点击右上角的对勾,保存调整效果,回到剪辑主界面,这段素材中的内容、比例都已经改变;- 裁剪画面边缘的干扰元素(水印等),“调整大小”是一个便利的选项;
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