Revision: 65266
          http://sourceforge.net/p/brlcad/code/65266
Author:   carlmoore
Date:     2015-06-11 16:31:59 +0000 (Thu, 11 Jun 2015)
Log Message:
-----------
change an 'or' to 'and'; explain that scr_width and scr_height MUST be included

Modified Paths:
--------------
    brlcad/trunk/doc/docbook/system/man1/en/bwrect.xml

Modified: brlcad/trunk/doc/docbook/system/man1/en/bwrect.xml
===================================================================
--- brlcad/trunk/doc/docbook/system/man1/en/bwrect.xml  2015-06-11 16:21:33 UTC 
(rev 65265)
+++ brlcad/trunk/doc/docbook/system/man1/en/bwrect.xml  2015-06-11 16:31:59 UTC 
(rev 65266)
@@ -52,7 +52,7 @@
 <option>-n </option><replaceable>file_height</replaceable>
 and
 <option>-N </option><replaceable>scr_height</replaceable>
-flags specifies the height in scanlines of the input file or display device
+flags specifies the height in scanlines of the input file and display device
 respectively.</para>
 
 <para><option>-s </option><replaceable>squarefilesize</replaceable>
@@ -60,6 +60,12 @@
 <option>-S </option><replaceable>squarescrsize</replaceable>
 set both the height and width to the size given (for input file and display 
device respectively).</para>
 
+<para>
+(<replaceable>scr_width</replaceable> and 
<replaceable>scr_height</replaceable> must be set
+to positive values, either separately via <option>-W</option> and 
<option>-N</option>, or
+jointly via <option>-S</option>.  This is because they start with default 
values of zero.)
+</para>
+
 <para><option>-o </option><replaceable>out_file.bw</replaceable> is a way of 
specifying output
 file name.</para>
 

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