Cells are card piles that can contain one or more cards, in a way of temporary storage. Top card ia available for playing. Unlike the reserve, carda can enter to the cells and exit from them. Typical games using cells are Free Cell and Montana related games. Only the top card is visible, or an empty shadow if the cell is empty.
In same games where cells contain more than one card, a little number beside the cell shows the number of cards in the cell:
To move teh top card of one cell to other game element, drag and drop over the element target.