How do I move objects in Android Studio from the xml design mode? : I am a junior developer who study development in the school.

I have to make a mini-project - calculator, so I've started work on this.
When I'm trying to place some buttons in their place (by numerical order) there is a problem:

For example, I decided that I want 3 buttons per line.
one I am trying to move the upper line all the buttons lose there order.
Is there an auto-ordering so I can disable ?


Regards
Aviv