Popup effect on portfolio

Hi,

I am sorry if the question has already been asked. I couldn’t find it in the forum so far.

I’m creating a website with the “Argent” theme and wanted to use portfolio as a way to organise the written content (posts, so to speak). So on my front page, I have my 5 “portfolio-sections”. So far, all good. But when I click on one of them, it redirects onto the correct page, but a sort of white “pop up” with the content of the page takes up the whole screen. I need to click on it, for it to disappear and my page to appear correctly. Is there any simple way to disable that feature ?

Thank you very much for your kind support !