Index: 03_drawing.html
===================================================================
--- 03_drawing.html	(revision 1318)
+++ 03_drawing.html	(revision 1319)
@@ -176,7 +176,7 @@
 <tr><th colspan=3 bgcolor="#aaaaaa"> {des3:27} arc properties
 <tr><th> property   <th> mandatory <th> description
 <tr><td> <i>oid</i> <td> yes       <td>&nbsp;
-<tr><td> center     <td> yes       <td>x;y coords of the center point
+<tr><td> cx, cy     <td> yes       <td>x;y coords of the center point
 <tr><td> r          <td> yes       <td>radius in coord units
 <tr><td> sang       <td> yes       <td>start angle [0..360)
 <tr><td> dang       <td> yes       <td>delta angle [+-360]