The mod adds dragging support to use/sell/buy cards like on the mobile version of the game. Works great on Steam Deck using the touch display.
The mod implements a hybrid mix between the desktop and mobile UI. You can both click on a card and click on the action button like normal, or you can drag the cards to the actions area that shows up when a card is being dragged on the mobile version of the game.
The mod also add the ability to select card in your hand by dragging across them. You can also deselect card this way. The state (selected or not selected) of the first card touched, decide what happen to all the card you touch.
Some options are available in the game settings: