World Preview is a mod for visualizing Minecraft world seeds before they are generated.
https://modrinth.com/mod/world-preview

Unfortunately this will not be possible, the tab layout of that mod won't translate well to my tab layout.

I was just to create a duplicate request for that until i found this one buried among the closed ones.

@lamaprogramer why not add a separate item on this corner of the screen?

Or as a button between the seed text field and the Generate Structures toggle:

Pingging @caeruleusDraconis to see if something would need to be done on his side to support ReimaginedMenus (maybe offer an alternate screen outside the tabbed one just for this mod)

I could easily do that, however, the problem isn't where to open the menu, it's the mod's layout. It doesn't translate well to my layout, I would have to somehow completely redesign their GUI. So unless, compatibility is added on their side, I can't really do anything with it. However, I wouldn't expect them to, the code for my mod isn't easily externally extendable. I may eventually change this if or when compatibility becomes a main focus for this project.