double FormatProperties.MidlineMidline as a percentage of the height. Use Midline to override the default (50%) for a graphical object if there is a more natural center point. Example = HBox { VAlign: Center; Span { TextHeight: 50pt; "+"; }; Shape(null, 10) {// Midline: 70%; // Set midline to 70% of the height of the object OpenPath(0, 10) { LineTo(20, 10); } };};+