The verticalChangeMin attribute specifies the height of the object as a percentage of its base size when the tag or expression evaluates to its minimum value.
All the graphic drawing object elements (except for panel and image) contain this attribute, within the animateHeight element, nested within the animations element.
FactoryTalk View equivalent: The At minimum check box and text box in the Vertical change (Percent) area on the Height tab of the Animtion dialog box