How do I change the size of the cards on spider solitaire?

Hi,

My grandmother adores playing the computer game Spider Solitaire. The cards used to be huge, which was great because her vision isn't the best anymore. My uncle took it upon himself to change the font size of the computer, which also changed the card size. Now, though the font size was changed back, no one can figure out how to change the cards back to the way they used to be. Please help, and thanks in advance!How do I change the size of the cards on spider solitaire?
Have you tried clicking on the maximize button on the upper right margin of the game?