Weird Terminal Font Rendering

Hello all,

I am a new user of Macbook Air 11", which is running El Capitan (OS X 10.11.4).

I tried to configure the font in Terminal and found the font rendering quite "weird".

I have no clue what went wrong. Only some fonts, such as 'Courier New', look normal.

I installed iTerm2 and the text looks equally weird.

Is there any option that I may try?

Thanks in advance.

Brian