Add the externalBlue.css style sheet to externalCSS.html by placing a link tag (" ") between the file's opening "" and closing "" tags.

Upload your custom .css file to the AEM server by selecting New > File and browse to the file's location on your local machine. Once uploaded, you will see the .css file in the list of assets in your ...

If you have multiple HTML files and want to apply the same style to all of them, consider using an external CSS file. Create a CSS file (e.g., styles.css) with the following content: ...

Move to the CSS file and add the stylistic attributes to your navigation menu. An important factor to remember here is to set the text decorations to ‘none’.