How do i make Anki Sub Decks?

I am making flashcards for gcse chem and i imported a deck for unit one and it went straight in and i wanted to put it under a chem like folder almost and also for when i add other ones or import them i dont want them in seperate folders almost but differnt decks under chemistry. please help.

Decks are folders that hold cards and other decks.

You can make empty decks by clicking Create Deck at the bottom of the main Decks screen. You can move decks into/out of other decks by renaming them, or by drag-drop. You can move cards between decks with Cards > Change DeckBrowsing - Anki Manual .

Before you get too far down the road with a complicated subdeck structure – consider Tags as an alternative. Adding/Editing - Anki Manual