diff --git a/escpos/impl/bematech.py b/escpos/impl/bematech.py
index <HASH>..<HASH> 100644
--- a/escpos/impl/bematech.py
+++ b/escpos/impl/bematech.py
@@ -64,6 +64,11 @@ class _ESCBematech(_CommandSet):
     MP-4200 TH Programmer’s Manual, revision 1.0.
     """
 
+    def set_expanded(self, flag):
+        onoff = '\x31' if flag else '\x30'
+        self._impl.device.write('\x1B\x57' + onoff) # ESC W n
+
+
     def set_condensed(self, flag):
         onoff = '\x0F' if flag else '\x48'
         self._impl.device.write('\x1B' + onoff)
@@ -193,6 +198,10 @@ class MP4200TH(GenericESCPOS):
         self._escbema = _ESCBematech(self)
 
 
+    def set_expanded(self, flag):
+        self._escbema.set_expanded(flag)
+
+
     def set_condensed(self, flag):
         self._escbema.set_condensed(flag)
Added set_expanded for Bematech ESC/Bematech