Make fade of post heading more transparent, second action button

Voyage gives me what I was looking for – a slider that puts the header of the post above its image. However, as the post header fades out and the next one fades in, they overlap and this makes them hard to read. You can see this at doulajerusalem.chanakatzman.com/. How can I fix this?

This is a bilingual site. I need two action buttons, one in each language. How do I put them in?