Font (Monaco) anti-aliasing Pro vs. PE

Does DTPro turn off anti-aliasing (Monaco only) if the size is under 11 pts?

I use Monaco 9 for plain texts so it prints nicely and zoom it in 3 times larger for display purpose. PE displays the font fine (screenshot) but it’s pixelated in Pro (screenshot) unless I change the size to 11 pts. Other fonts (Times, Helvetica, etc.) are well anti-aliased. I haven’t tried it with all System fonts though.

I’ve tinkered with Preferences but didn’t find anything that might cause this. Anyone else experience this?

Update: the latest PE (1.9.4) also exhibits the same problem.