Hi qibentie,

> How I can make these cubes in a group but not use
> layer, just a group that easy to select.

Currently in v2 the way you would do that would be to select them all and assign them a name, which you can do by clicking in this area in the properties panel:



After you have assigned a name, then an entry will show up in the Objects section of the Scene browser so you can use that entry for hiding, showing, locking, or selecting it:



- Michael