问题
I want to to achieve this effect.
回答1:
Make sure you have the Rect transform tool selected (press T while Scene view has focus). This will correctly display the bounds of your selected UI element. Also, what you are changing in your video is the anchor mode, NOT the text alignment. You can edit that in the Text component inspector, in the Paragraph section.
来源：https://stackoverflow.com/questions/34500532/text-not-adjusting-properly-on-canvas