I do remember what I did but text in code windows became very blur.
Another screens such as option, solution explorer are still very clear.
How to fix it?
I tried to reset to reset all setting but no luck.
Sounds odd. I could imagine it happening in 2010 with the WPF based code editor, but I haven't seen anything like that with VS2008. Could you post a screenshot? I might be able to get more info for you.
Go into Tools -> Options ... reset your Font being used... (default is Courier New) ... it look like you may have accidentally nudged it to Courier... after you open the Options dioalog, select Fonts & Colors ... then hit the "Use Defaults" button... that should put it back.
-tg
edit - ARGH! That's what I get for taking my time and making sure the change should work.
ok, well for the sake of checking, when you are in that screen in the options menu, and "Text Editor" is shown in the drop down that says "Show settings for", what are the font settings you have there?
I don't really have an answer as to why it would happen. My guess is maybe even though it was showing 10, perhaps it was actually really set lower, like 8 or 6
Maybe it was actually not loading your settings properly before now. Courier New size 10 usually looks like that because it's not one of the font's original sizes so it has to be resized which usually looks a bit strange.
I got it!
I copied blurred text to a new doc file and found out the name of font for the blurred text. This font is just added by me. I delete this font from window\font folder. Everything works great. I can take 10 now.