diff --git a/docs/source/release/v4.2.0/reflectometry.rst b/docs/source/release/v4.2.0/reflectometry.rst
index ef33a60ed1c725c5aabc2460d8a4cb79f8845fc8..64b4bb1e0a8e7481432926496fdfae183ec41d35 100644
--- a/docs/source/release/v4.2.0/reflectometry.rst
+++ b/docs/source/release/v4.2.0/reflectometry.rst
@@ -16,6 +16,7 @@ New
 - Batch Save/Load: full saving the runs table and all of the related settings for a batch is now possible.
 - Project Save and Load: full saving of runs table including styling and related settings on a batch by batch level. All batches are saved.
 - Integration with Project Recovery: GUI should now recover should recovery successfully recreate all workspaces
+- The Slit Calculator dialog can now be accessed from the Tools menu.
 
 Improved
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