Hi, sorry for the late reply!
As I can see, you have a portfolio module on the home page. What style do you use?
Do you mean when hovering on the icon glass & chain, it will show the text of each icon?
If that's what you want, you need to modify the code of the style you're using.
You can modify the file: components\com_tz_portfolio_plus\templates\zalta\html\default\mod_tz_portfolio_plus_portfolio\plg_mediatype_image\default.php