Creating a new deck is done using either the Classic Deck Editor or Visual Deck Editor.
They can be accessed either by clicking the "Create Deck" button in the TabHome screen, which will open the default deck editor configured in the "User Interface" -> "Deck editor/storage settings" -> "Default deck editor type" setting, or by selecting "Deck Editor" or "Visual Deck Editor" under the "Tabs" application menu located at the top.
See Editing Decks for information on how to modify the attributes and contents of a deck in the Deck Editor widgets.
See Exporting Decks for information on how to store and persist your deck either in-client or to external services.
See Importing Decks for information on how to import existing decks either in-client or from external services