unity: scene shows nothing, PLEASE HELP

anyone please help me,
whenever i put a prefab or model into the scene, i do not see it, it jest shows th y,z,x pointers. i don’t even see the camera nor gizmo. basicly i can’t see anything in the scene when i put somethig in it. i try to click f and i still don’t see it, i try to scale as big as posibly and i still won’t be able to see the prefab, camera, models etc…

please if anybody can help me please reply

Maybe you have the scene set to display overdraw or mip maps?