This tip applies to all kind of templates. An example would be the OneDayBlue.artx file.
In the Styling from scratch and Adding additional CSS to the project tips, we have modified the CSS stylesheets of the relevant project. Each of these examples presents a different approach to the problem:
We modified an exported CSS template file
We added some CSS definitions directly in Artisteer
Each of these techniques has its advantages and disadvantages. If you edit the exported CSS file, you can do it with your favorite text editor, which is probably equipped with many tools that make the job more comfortable (like code highlighting). Also, while editing the exported CSS file, you will see all of the content (CSS definitions used in the template) and don't have to write blindfolded. The disadvantage of this approach is that if you modify your project in Artisteer (using GUI) and export the new version once again, your file will be overwritten with the new one, and...