Hey,
Code:
digits(20,20,"Player PositionX="

writes Player PositionX= at 20, 20
Code:
%0.f",

uses c style string manipulation (and closes the string)
Code:
*,

tells the engine to use standard font (Arial#10 or Arial#12 i think)
Code:
1,

is the factor of what's displayed (change to 2 and everthing will be doubled)
Code:
object_pos.x)

obvioulsy the variable being displayed

hope this helps
(sorry to intrude) laugh