[Therion] minor doc patch

[Wookey]

I noticed that the thbook wasn't clear on a small point so here is a
little patch (against 0.3.10 - debian sources) to clarify:

--- ch03.tex~	2006-04-02 19:38:38.000000000 +0100
+++ ch03.tex	2006-09-18 02:01:12.193138928 +0100
@@ -264,10 +264,11 @@
   {\it map legend related:}\Nobreak
 
   * |map-header <x> <y> <off/n/s/e/w/ne/nw/se/sw/center>| = 
-    print map header at location specified by |<x> <y>|. 
+    print map header at location specified by |<x> <y>|.
     Predefined map header contains some basic informations about
     cave: name, scale, north arrow, list of surveyors etc. It is fully 
     customizable (see the chapter {\it Changing layout} for details).
+    <x> is easting (left-right on page). <y> is northing (up/down page).
     Ranges for |<x>| and |<y>| are -100--200. Lower-left corner of the map 
     is |0 0|, 
     upper-right corner is |100 100|. The header is aligned with the specified 


I will be providing a much more significant patch on the import
command shortly (although some things still aren;t working quite right
- so it may need some more discussion first).

Wookey
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