You can change the size of the object by changing the value of Width % and Height %. The default values are 100%, which is the original size. Changing both these values to 50% makes the object half the original size; changing the values to 200% makes the object twice the original size. To scale the object proportionally, change Width % and Height % the same amount.
You can adjust the spacing of tiled objects by changing the values for X Spacing % (height) and Y Spacing % (width). Entering a negative value causes objects to overlap; entering a positive value creates space between objects. A value of zero makes the bounding boxes of the objects flush with one another.
You can pan the entire object fill pattern within the larger object by adjusting the values for X Shift % (height) and Y Shift % (width). These values let you control how the fill pattern looks at the edges of the larger object.
Adjusting the Stagger % lets you stagger the position of every other row or column. For example, to illustrate a brick wall, you might set the Stagger % to 50.