I prefer that much over my proposal and abandon comments inside. I
knew the manual heading but since I stuck on the word `debugging'
and _underestimated_ the word `Editing', at least when already
editing in a org-mode buffer, I thought there is no need to read as
long as my formulas work... Not only for this reason but mostly
because of the great value I think it is more than worth mentioning
it in the spreadsheet summary in the manual somehow like this:
======================================================================
--- org.texi.orig.texi Sat Mar 13 15:41:20 2010
+++ org.texi Sun Mar 14 12:39:07 2010
@@ -1931,7 +1931,9 @@ derive fields from other fields. While
implementation is not identical to other spreadsheets. For example,
Org knows the concept of a @emph{column formula} that will be
applied to all non-header fields in a column without having to copy
the
-formula to each relevant field.
+formula to each relevant field. There is a special formula editor
with
+features for highlighting fields in the table corresponding to the
+references at the point in the formula, moving these references by
+arrow keys and a formula debugger.
@menu
* References:: How to refer to another field or range
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