I cannot use PS CC 2014 right now because the interface is too large to work with on my screen. I have adjusted The Windows 8.1 display/text to %125 and %100. Neither of these worked. I have uninstalled the program and uploaded again, this also did not work. I have attempted to adjust the UI settings under the "Interface" tab of the preferences from default small setting to tiny, and even large because none of these changes had any effect on the size of the UI. If this problem cannot be resolved shortly then I will have to find the PS CS6 version and download that. I'm already an hour behind schedule trying to fix this. Suggestions are welcomed and appreciated.
Under the preferences, at the very bottom of the list is a tab for "Experimental Features." There is a default setting for, "Scale UI 200% for high-density displays (windows only)" uncheck this box, close out of PS, open PS and everything should be back to normal. Good Luck.