What is the best way for handling textures in UE4 with regards to atlases and UI/HUD?

I have been looking at the best way to deal with textures in UE4 and I want to be sure I am getting the right information. Can we use atlases, is there an atlas tool, and is that actually the most efficient way to go about dealing with texture assets in UE4? In particular, I am concerned with UI/HUD textures.