Sets the Z coordinate (in floating point pixel space) of the text. The Z coordinate of the text is the text's graphical layer. Higher Z values are towards the back of the map (i.e. behind other text and images) whereas lower Z values are closer to the camera.

Refer to the table in SetImagePositionZ for where each Z index will place the image.

# Set the location of "Text" to Z=1 
# (Behind the units, but on top of the terrain). 
"Text" SetText
1 SetTextZ