[gimp-help/gimp-help-2-10] Fix issue #253 Improve description of jpeg progressive option...

[Jacob Boerema <jboerema src gnome org>]

commit e4f358179d8618825155c44c6169dabc917a53ff
Author: Jacob Boerema <jgboerema gmail com>
Date:   Sun Mar 20 22:23:10 2022 -0400

    Fix issue #253 Improve description of jpeg progressive option...
    
    by mentioning that it may not work on certain older devices
    
    (cherry picked from commit 4ecc7be7f8f4261c91bd8bf5de8107374dfc9f8a)

 src/using/fileformats.xml | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)
---
diff --git a/src/using/fileformats.xml b/src/using/fileformats.xml
index c92fc1b3a..d9764d553 100644
--- a/src/using/fileformats.xml
+++ b/src/using/fileformats.xml
@@ -501,16 +501,22 @@ url="http://en.wikipedia.org/wiki/High_Efficiency_Image_File_Format";>Wikipedia</
                 <term>Progressive</term>
                 <listitem>
                   <para>
-                    With this option enabled, the image chunks are
-                    stored in the file in an order that allows
-                    progressive image refinement
-                    during a slow connection web download.
-                    The progressive option for JPG has the same
-                    purpose as the interlace option for GIF.
-                    Unfortunately, the progressive option produces
-                    slightly larger JPG files (than without the
-                    progressive option).
+                    With this option enabled, the image chunks are stored in
+                    the file in an order that allows progressive image
+                    refinement during a slow connection web download. 
+                    The progressive option for JPG has the same purpose as the
+                    interlace option for GIF.
+                    Unfortunately, the progressive option produces slightly
+                    larger JPG files (than without the progressive option).
                   </para>
+                  <note>
+                    <para>
+                      Beware that certain older TVs and photo frames (and maybe
+                      other devices) may not be able to show jpeg images that
+                      have been exported with the progressive setting enabled
+                      (which is the default).
+                    </para>
+                  </note>
                 </listitem>
               </varlistentry>
               <varlistentry>