ProShow Producer Modifiers are an undocumented feature. Some modifiers are easy to use. To change the size of a layer using a Zoom Modifier is not as easy as it first seems. Basically, all a zoom modifier does is change the layer's zoom setting by a percent that's represented by the modifier value. However, when the layer's two axes have unequal zoom values, the modifier needed to get a specific zoom setting may be affected by the zoom setting of the opposite axis zoom value. This demonstration shows the relationships needed to determine the correct value of modifier to achieve the desired size change to a layer in each axis. Visit my site at http://fpvp.wordpress.com