|Visio XML Reference|
Specifies the distance between the left border of the text block and the text it contains. This value is independent of the scale of the drawing. If the drawing is scaled, the left margin remains the same.
Optional string. Represents a unit of measure. The default is DP. For details about DP, see Units of measure.
Optional string. Represents the element's formula. This attribute can contain one of the following strings: "someFormula" if the formula exists locally, "No Formula" if the formula is locally deleted or blocked, or "Inh" if the formula is inherited.
If the attribute is not present, the element's formula is a simple constant, for example, <element>5</element>.
Optional string. Indicates that the formula evaluates to an error. The value of Err is the current value (an error message string); the value of the element is the last valid value.
LeftMargin cell (Text Block Format section)