+ /** @brief Adds an effect to an element.
+ * @param ix index of the effect in the effects menu
+ *
+ * The current implementation allows for one QGraphicsEffect to be added
+ * along with the typewriter effect. This is not clear to the user: the
+ * stack would help, and would permit us to make more QGraphicsEffects
+ * coexist (with different layers of QGraphicsItems). */