Drag your top and bottom guide lines so that they snap to the top and bottom of your image (as shows in fig 3a & b).

拖动你的顶部和底部的参考线，直到他们吸附在图片的顶部和底部。

youdao

Drag your top and bottom guide lines so that they snap to the top and bottom of your image (as shows in fig 3a & b).

拖动你的顶部和底部的参考线，直到他们吸附在图片的顶部和底部。

youdao