On: UX Crash Course: Fundamentals

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I have a nice little bookmarklet that works wonders:

    javascript:(function(){var%20newSS,%20styles='*%20{%20font-size:16px%20!important;%20}';%20if(document.createStyleSheet)%20{%20document.createStyleSheet("javascript:'"+styles+"'");%20}%20else%20{%20newSS=document.createElement('link');%20newSS.rel='stylesheet';%20newSS.href='data:text/css,'+escape(styles);%20document.getElementsByTagName("head")[0].appendChild(newSS);%20}%20})();

Basically it changes all font sizes to 16px, which I find suitable for my configuration. YMMV. I usually use it when the fonts are too small. And I have another one which colors the text black, background white and links blue - but in this case that was not necessary.