even spaces and center objects

I want to know how to centralize and put the same spacing between objects.

Depends on the objects. Show us something.

One method for evenly spacing out objects is the Pattern tool.

I have two questions:

  1. how to use de arrow key to move objects
  2. How to center objects in space. I do it manually and take to much time
  1. You can not.
  2. You can use different methods, here is a couple of them
  • Draw a constrction line and use it as a guide.
  • Align center object to one side, calculate where is the center, just dividing the length between left and right wall, and then move your object by that length.

There can be a lot another methods depends on your needs. Just for another example you could center it in sketch before even do extrusion.