How to edit page with WP Baker?

Hi,
I have an issue to edit some pages in my website:
https://prntscr.com/vope7w
We would like to add a pdf in this dropdown list.
Our problem is there is nothing in the backend to edit this part of the page
https://prntscr.com/vopeje
WP baker doesn’t give any option, the CLassic editor neither does.
https://prntscr.com/vopf02
Do you know where to edit this dropdown list in order to add a file?
I searched everywhere in the backend. I tried with elementor, but impossible to do it.