Dreamweaver freezes when switching to another window

[Blacktrace Hanoi]

Hi, I'm encoutering something really troublesome. While I was selecting the font family which was not yet available for CSS in Dreamweaver, I switched to Chrome to see the collection of fonts that I needed to choose then when I came back to Dreamweaver to type them down, and it freezed. I try several times, just switching to another program's windown but the result is still the same, which is very irritating. 

Do anyone knows how to fix this situation ? Thank you.

[BenPleysier]

Dreamweaver goes ferile when code is incorrect. The best thing for now is to restart the computer and ry again.

If it happens again, copyand paste the code here so that we can see what is going on.

[Nancy OShea]

If it happens again, Restore Preferences.

https://helpx.adobe.com/dreamweaver/kb/restore-preferences-dreamweaver.html