One of the way to change it is to directly edit the wp-admin.css file under the “wp-admin -> css” folder. This is not a good solution because the next time you upgrade your WordPress, your files will be overwritten. The best way is to insert a small function to your functions.php. Open your functions.php file in your Themes folder. Add the following code to the end of the file: You can change the font-family to the one you like. I personally prefer the Tahoma and Verdana font family. Save and upload the functions.php file back to the server. This is the result:
That’s it.
