Hi, As a web designer, I often work with text files and I use Quick Look a lot to view my files quickly without opening any application. Normally all plain text files such as .txt .html .css .php .srt etc. are shown in a monospace typeface in front of a white background. Other formatted text files such as .rtf are shown in the font as formatted (duh). Recently the Quick Look of my plain text file are shown in a Serif typeface on a yellowish background. This is annoying since I really like to have my plain text files shown in "plain text". The formatted text files are shown correctly, however. I have a suspicion that this is cause by Writer Pro app because I installed it recently. And the font and background in Quick Look seems just like those in Writer Pro. I've checked in /System/Library/QuickLook and nothing is suspicious and the modified time of the folder is long time ago before the issue occured. The /Library/QuickLook is fine as well, only iBooksAuthor.qlgenerator and iWork.qlgenerator are there. Question: How to set this back to default? How to tweak the style of Quick Look if it is tweakable? Thanks for your time and attention.