diff --git a/docs/source/interfaces/Engineering Diffraction.rst b/docs/source/interfaces/Engineering Diffraction.rst
index c103695821470e701f5785a905224b8ec79dbcb7..8bed2a18ab538e84f45e82b2a3053577930e3385 100644
--- a/docs/source/interfaces/Engineering Diffraction.rst	
+++ b/docs/source/interfaces/Engineering Diffraction.rst	
@@ -348,7 +348,7 @@ To use the Fitting tab, user is required to follow these steps:
    files *User may click Load button to load the focused file to the
    canvas*
 2. List of expected peaks which can be either by browsing a (*CSV*) file,
-   manually selecting peaks from the canvas using peak picker tool after
+   manually selecting peaks from the canvas using peak picker tool and the "Add Peak to List" button after
    loading the focused file or by entering the peaks list within the text-field
 3. Next click on the *Fit* button if you would like to fit single focused
    file or you can click *Fit All* button which will enable user to
diff --git a/docs/source/release/v4.0.0/diffraction.rst b/docs/source/release/v4.0.0/diffraction.rst
index 8e0c9325d7e3dbeeafab7f378b7ee0c2d7bf5e6e..42b00838ba831e89141e89e58e30ba4d19171632 100644
--- a/docs/source/release/v4.0.0/diffraction.rst
+++ b/docs/source/release/v4.0.0/diffraction.rst
@@ -123,6 +123,7 @@ New
 ###
 
 - Scripts added that produce the same results as the ISIS engineering GUI (supports ENGINX and IMAT), this is to allow use with ISIS autoreduction.
+- Changed 'Add Peak' button on fitting tab of gui to read 'Add Peak to List' to clarify use. 
 
 Bugfixes
 ########