From 5ebbc81cb7cd547565dada5000e9513c65ffbf20 Mon Sep 17 00:00:00 2001
From: Joseph Ramsay <joseph.ramsay@stfc.ac.uk>
Date: Tue, 5 Dec 2017 15:03:15 +0000
Subject: [PATCH] Re #21342 Update Engg docs for improved EnggFitPeaks

---
 docs/source/interfaces/Engineering Diffraction.rst | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/docs/source/interfaces/Engineering Diffraction.rst b/docs/source/interfaces/Engineering Diffraction.rst
index a3d34483279..febda0dcdc7 100644
--- a/docs/source/interfaces/Engineering Diffraction.rst	
+++ b/docs/source/interfaces/Engineering Diffraction.rst	
@@ -337,7 +337,8 @@ Fitting
 
 The Fitting tab provides a graphical interface which fits an expected
 diffraction pattern and visualises them. The pattern is specified by
-providing a list of dSpacing values where Bragg peaks are expected.
+providing a list of peak centre values where Bragg peaks are expected.
+These values can have units of either TOF of dSpacing but **not** both.
 The algorithm :ref:`EnggFitPeaks<algm-EnggFitPeaks>` is used to
 background fit peaks in those areas using a peak fitting function.
 
-- 
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