How to set or change the deck for cards?

You can specify the deck of the cards in deck Page Property or deck Block Property. When both of them are declared, deck Block Property takes priority.

Example 1

deck:: [[Tutorial]]

deck:: Tutorial 2
The capital of Japan is {{cloze Tokyo}}.

Nested decks be specified in deck property of pages and blocks by using the / or :: character as separator. https://github.com/debanjandhar12/logseq-anki-sync/releases/tag/v2.2.0

If the block which generates anki cards is in a page under some namespace, then the default deck will be that of the namespace instead of "Default". https://github.com/debanjandhar12/logseq-anki-sync/releases/tag/v2.2.0