How can i switch card order

I made all of cards ‘forward>backward’ order. Now I want to make only one deck of cards to ‘backward>forward’ order. I tried to follow this video
But at 1:31 in that video, when I click ‘add new card’ then it said 'it’ll make 401cards which are entire of my cards. I just want to switch card order in one deck, not my entire decks. How can i make it?

You may want to make another note type for this specific deck.
Go to Tools > Manage Note Types > Add, and clone your existing note type.
Then select your new type and click Cards then Flip.
Finally, in the card browser, select all the cards of the deck, right-click, and click Change Note Type and choose your new type here.

Please see:


Thank you It works!!