From [ CADLO ] menu launch the command "Setting user coordinates system".
UCS setting
First clic sets the origin of the system ;
Second clic sets the direction of X axis ;
Last clic sets the direction of Y axis.
Shortcut "u" sets the UCS as following : origin at left lower corner of printable zone, X axis toward left, Y axis toward up.
Shortcut "d" sets UCS to default Draw coordinates system .
While active command it is possible to :