Photoshop anti-aliasing text problem

Hi everyone.

I noticed that texts in Photoshop need anti-aliasing effect.

If you look at above text carefully

you will find that the text has no anti-aliasing effect.

Too add anti-aliasing effect:

1. Drag text to add anti-aliasing effect

2. and then click mouse right button.

3. Click some attribute in the red rectangle like 'sharp'

except for None.

Finally you will see the text with anti-aliasing effect.