Texture pack show me preview on floor how to remove

Hello i am new at unreal engine and still learning but today i put my first new map and i buy texture pack and put,then this show me up.


Your floor (and maybe other meshes too) are set to static + one or more of your lights too…
What you see is that the engine is telling you that the shadows/lighting you’re seeing is just preview: you need to build your lights!

There’s also a setting to turn off “show preview indicator” for lighting.