miscellaneous update

git-svn-id: http://svn.code.sf.net/p/netpbm/code/userguide@3173 9d0c8265-081b-0410-96cb-a4ca84ce46f8

1 files changed, 4 insertions, 2 deletions

diff --git a/pam.html b/pam.html
index b9f01707..0078d4f0 100644
--- a/pam.html
+++ b/pam.html
@@ -212,7 +212,9 @@ and thus their own subformats.
 
 <p>Tuple type affects <em>only</em> the meanings of the samples (which are
 unsigned integers) in the tuples of the image.  It does not affect how the
-samples or tuples are encoded or their order.
+samples or tuples are encoded.  Tuple type may affect the meaning of a tuple's
+position in the array (e.g. it may indicate in a visual image that a tuple
+in Row 1 is one at the top of the image rather than the bottom).
 
 <p>Tuple type never determines how many samples are in a tuple (that is
 instead determined by the DEPTH header line).  Tuple type could be said to
@@ -251,7 +253,7 @@ of the equivalent PGM image.
 <h4>Color</h4>
 
 <P>A color image, such as would alternatively be represented by a PPM image,
-has a typle type of "RGB".  Such a PAM image has a depth of 3.  The maxval,
+has a tuple type of "RGB".  Such a PAM image has a depth of 3.  The maxval,
 height, width, and raster bear the obvious relationship to those of the PPM
 image.  The first plane represents red, the second green, and the third blue.