Unicode art as the default printing

edit

I installed Sagemath versio 9.0 using conda and and I'm trying to improve the display style. Right now the display style is something like:

sage: x^2
x^2

In a previous computer I used to get pretty printing by default in Sage. I can reproduce the behavior using unicode_art:

sage: unicode_art(z^2)
 2
z

But I'd like this to be the default behavior. I know this must be simple but I cannot find that on the docs (probably because I'm searching using the wrong terms or something).