7 or 8 – Look at your own card
9 or 10 – Look at someone else’s card
Jack or Queen – Without looking at the card, you can blind switch one of your own with someone else’s.
Black King – You can look at anyone’s card and switch anyone’s card with any one of yours.
Scenario: If you pull a 7 card and want to swap it with your 8 that you have face down, you are refusing to play the card and since you can only play the cards you pull, the 8 that you swapped and threw down in the throwaway pile does not count as a “Look at your own.”