To change the vertical spacing of cards in the tableau, click with the right mouse button in a game window and select Options... from the popup menu (or use the Options... icon in the status bar).
When the Options dialog becomes visible, select the Spacing & Speed tab. Manipulate the slider to increase or decrease the space between cards. A real-time preview image is provided.
Spacing settings are saved for each card size. Tableau piles that become too large for the game window are automatically compressed to keep all cards visible regardless of the card spacing setting.
The same tab also displays an Autoplay Speed adjustment. Manipulate the slider to increase or decrease the speed of the autoplay moves for all games.