Fullscreen theme, adding post title to homepage images

Hello there, I’m usig the fullscreen theme by graphpaperpress and I wanted to add the post title when the mouse pointer go on the image in homepage. (www.aurezio.com).

gpp support (wich is free for little helps) told I have to call the page title in the home.php and the use the CSS to place it where I want but I’m not good at coding…

Is there anyone that could help me in doing this?

Thanks in advance