You can change the formatting of the Text object by changing the text style associated with it, or by editing the properties of the Text object. You cannot apply formats to individual words and characters.
To change a text style associated with an individual Text object, set the StyleName property to a new text style. Once you have changed the text style, use the Update method for the Text object to see the changes in your drawing.
In addition to the standard editable properties for entities (color, layer, linetype, and so forth), other properties that you can change on a Text object include the following:
Once you have changed a property, use the Update method to see the changes in your drawing.