+To learn how to craft your own CSS for use in REDCap CSS Injector, you'll need to use the developer tools for your web browser. Chrome supports the [Chrome DevTools](https://developers.google.com/web/tools/chrome-devtools/). Firefox supports [Firefox Developer Tools](https://developer.mozilla.org/en-US/docs/Tools). Using one of these tools you can access a REDCap page and inspect an element of the page you want to change. The dev tools allow you to see what CSS controls an element's appearance. You can change the values you think might give you the effect you want and review the result in real time on that page. Once you get the result you like, copy that CSS, trim it down to the part you care about, and test it in CSS inspector.
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