How do i group stuff?

what i mean: i select a bunch of stuff and make em one so when i click any of em they all select.

is this possible in radiant?

Save it as a prefab.
Then
When its selected you can move it freely. To edit ..... press edit ...enter prefab
Then edit...leave prefab and save when prompted.

To save as a prefab highlight what you want and press file..save selected.
Then load it back (right click) as a prefab.


You can unstamp once its in the final position.

^ Win!