Hello thaigerweb,
You have to write the custom css for this. Please write the custom css here. https://doc.acmethemes.com/supermag/#HowtoaddcustomCSS
You can use the child theme approach for customizing theme too. https://codex.wordpress.org/Child_Themes
In our premium version of theme, you can change the color of link so that it is easily distinguished from plain text. So we would recommended you to go to the premium version of this theme. http://www.acmethemes.com/themes/supermagpro/
Best Regards,
Acme Supports