diff --git a/README-emailler.md b/README-emailler.md
index 0a0b025..9921a60 100644
--- a/README-emailler.md
+++ b/README-emailler.md
@@ -302,7 +302,9 @@ However you create your template email, take note of the filename which is displ
 
 ## `EDIT.SYSTEM`
 
-EDIT is simple full-screen editor.  It uses Apple //e auxiliary memory to store the text buffer, allowing files up to 46KB to be edited.  The command keys are similar to the popular AppleWorks word processor.
+`EDIT.SYSTEM` is simple full-screen editor.  It uses Apple //e auxiliary memory to store the text buffer, allowing files up to 46KB to be edited.  The command keys are similar to the popular AppleWorks word processor.
+
+If RamWorks-style memory expansion is available, `EDIT.SYSTEM` can use it as additional editor buffers.  For each 64KB bank of RamWorks expansion, an additional 46KB buffer will be allocated.  With an 8MB RamWorks card, 128 buffers are available.  `EDIT.SYSTEM` is able to support editing of large files (>46KB) by splitting them across more than one buffer.
 
 <p align="center"><img src="img/edit-help1.png" alt="Editor help page 1" height="400px"></p>