When displayed, greeting cards are typically organized on a display fixture having multiple rows or levels upon which to sit the cards. Each row then has a front wall to hold in the card, yet is short enough to still view a portion of the greeting card above the wall. Because display fixtures are manufactured to have a specified amount of rows or levels at a specified depth, in order to adjust the specifications of a display fixture, other pieces may be used, for example, by attaching to the display fixture a convertible row to add another level or tier between set rows of the display fixture. By providing another row using a convertible row, another set of greeting cards may be displayed between cards displayed on other rows of the original display fixture, increasing the density of the overall display. Further, when an extra row is not desired, such a convertible row may be pushed flush against the back of the display fixture, while still attached, allowing the full depth of the row of the display fixture to be used.