A BillboardText object is similar to a Text object, except that the text is always oriented towards the View window and its height is given in pixels instead of metres. BillboardText retains its coordinates in space and in this way differs from the OverlayText object. Both static and dynamic text can be displayed by a BillboardText object using the same keywords as Text objects.
BillboardText is commonly used to label 3D objects. The advantage of using BillboardText is that the label is visible and readable from all view angles.
The keywords for BillboardText are identical to those for Text objects and have the same meaning, except for the TextHeight keyword, which now gives the height of the text in pixels instead of metres. At the present time, this input must include the units of metres (m) even though it is interpreted as pixels. This will be corrected in a future version of the software.