In Game Resolution Blurry

I am not good with computer terms and such so. I was DMing last night and during the session the resolution changed mid-game. Text, maps, and tokens were blurry. Everything appeared to be larger than before. My macro bar didn't fit eh screen like it had before. I an using Google Chrome. I cleared the cache and rebooted but it still is blurry. I opened Roll20 in Firefox and there is no issues with the resolution. It looked like it always was.  Any help would be appreciated. Thanks.   

Before we escalate this, it sounds like the magnification got changed on your browser. Can you check what the magnification is? It should be in the "View" menu of your browser, or in the right hand side of the URL bar.

Try pressing Ctrl + 0. Sounds like you zoomed in. Maybe a screenshot would help too. Edit: Whoops. Sorry keith.

Thank you for the replies. The Ctrl+0 worked. I must have hit it without knowing. Thanks Noon.

It happens to me, too. Glad this is resolved. I'll go ahead and close this thread.