I'm rebooting my blog, and I would like to hide feature images on actual posts, but let them display in thumbnails so I can use the tile/grid system to display them.

I found this old post discussing this issue, but I'm not sure where in the Tronar theme I should be looking to actually make the changes discussed in the plugin support page. It looks like maybe in the pattern for "header-with-cover.php" there could be something, but this is my first time really playing around with the parent theme.

I have exported a copy of the website as my backup, so I'm okay messing around with it. Any suggestions?