JAL-1076 add note in documentation about Alt rather than Control enabling group editi...

diff --git a/help/html/editing/index.html b/help/html/editing/index.html
index 3bef965..8a45f77 100755 (executable)
--- a/help/html/editing/index.html
+++ b/help/html/editing/index.html
@@ -22,7 +22,7 @@
 <p>There are two major ways to edit alignments - in 'Normal mode',
 gaps are inserted and deleted at the mouse pointer in various ways by
 clicking the left mouse button and pressing a combination of either
-shift and control (or the apple key on Macs) and dragging the mouse. Pressing
+shift and control (or the alt, option or apple key on Macs) and dragging the mouse. Pressing
 <em>F2</em> toggles the alternative <a href="../features/cursorMode.html">'Cursor
 mode'</a> keyboard editing facility, where the space bar and delete 
 keys add and remove gaps at the current editing position. The key
@@ -37,7 +37,7 @@ href="../keys.html">keystrokes table</a>.</p>
   If the current selection is a group over all sequences in the
   alignment, or a group over some sequences or all columns in the
   alignment, then hold down either &quot;Control&quot; 
-  key and drag the residue left or right to edit all sequences in the defined 
+  key (or the &quot;Alt;&quot; on OSX if &quot;Control&quot; does not work) and drag the residue left or right to edit all sequences in the defined 
   group at once.</p>
 <p><em>Copy/paste/cut/delete</em> - any sequences which are in the current selection
   box (indicated in red) may be cut and / or copied to a new alignment or deleted.