I cannot see gizmo to move the object. How can I see gizmo?

I want to move an object. I select the object and click ‘move’ icon but I cannot see gizmo. So I cannot move object. (I also clicked ‘rotate’ and ‘scale’ but I still cannot see gizmo) What should I do? I’m very new to Unity. Thanks.

I want to see arrows like in these images:

image