Sandbox : Unparenting a card

[JesterX]

Hello,

How do I "unparent" a card in the sandbox editor?

Here is my situation:

All my 52 cards of a "standard set of card" looks to be parent of one-another in the Table View.

[JesterX]

Oh, just found that if I select them all together and move them a bit at the same time, they unparent automagically!