Where I can specify debug and release folders name and the place of them ?

I have :
myproject
And when compile in release or debug modes :
myproject_the_name_of_the_kit_debug
myproject_the_name_of_the_kit_release

Where I can create or modify this rule to create the debug and release folders inside the project folder ? (not at same level )
I 'd want to do this for every project (I dont want to modify the .pro file everytime)
Thanks

It's the "shadow build" parameter in the project pane, build settings in Qt Creator.

You can't do this for every project with the default Qt Creator build.