Googling “hover over div to reveal another div” yields many revelant results so I’d start your research there if I were you.
You should also read up on the following CSS selectors;
– “:hover selector”,
– “general sibling selector ~”,
– “adjacent sibling selector +”
And if you’re rusty on positioning/layout, try here https://learnlayout.com
Should you need any specific help, feel free to post back with your code in a working but simplified CodePen demo, along with a clear description of the problem, what you’d like to happen instead, and what you’ve tried to achieve it, and then we can offer suggestings based on that. Unfortunately we can’t troubleshoot an image.