I think I found the solution in the SINGLE POST OPTIONS:
– From Customize, go to Single Post Options >> Post Navigation Options
– Select the available options for Navigation. (Default, Title and Image and Image) are the available options.
I was able to disable the image and also disabled the title and now it is both hidden. Now I see only the “main post” and the “Related Post” but not
post-navigations anymore. So everything should be OK.
BTW, I very much appreciated your quick answer.