Menu Creation

I’m looking to create a specific type of menu for our base building system, one that would provide thumbnail images of base building items in a 1" to 2" strip that runs completely across the bottom of the screen when the base building bind key is struck. Player will be able to select the item from the menu and set them into the game. This menu will grown to be fairly extensive as players skills increase and they are able to create more items to assist them in the game, therefor and arrow to manually move the menu to see all base building options will be needed on either end.

I’ve encounters this type of menu in other games but I’ve yet to find a link or youtube video to learn the fundamentals to get me started on this process. It s very likely that my search words are leading me astray.

Can anyone provide me with a link or video?

Thanks in advance