diff --git a/PowerEditor/src/Notepad_plus.cpp b/PowerEditor/src/Notepad_plus.cpp
index 5e8be1e82..90b50ae33 100644
--- a/PowerEditor/src/Notepad_plus.cpp
+++ b/PowerEditor/src/Notepad_plus.cpp
@@ -1578,6 +1578,22 @@ void Notepad_plus::deleteMarkedline(int ln)
 	_pEditView->replaceTarget(emptyString, lineBegin, lineBegin + lineLen);
 }
 
+void Notepad_plus::inverseMarks()
+{
+	int lastLine = _pEditView->lastZeroBasedLineNumber();
+	for (int i = 0 ; i <= lastLine  ; i++)
+	{
+		if (bookmarkPresent(i))
+		{
+			bookmarkDelete(i);
+		}
+		else
+		{
+			bookmarkAdd(i);
+		}
+	}
+}
+
 void Notepad_plus::replaceMarkedline(int ln, const TCHAR *str) 
 {
 	int lineBegin = _pEditView->execute(SCI_POSITIONFROMLINE, ln);
diff --git a/PowerEditor/src/Notepad_plus.h b/PowerEditor/src/Notepad_plus.h
index c781243a5..cdab3c244 100644
--- a/PowerEditor/src/Notepad_plus.h
+++ b/PowerEditor/src/Notepad_plus.h
@@ -536,6 +536,7 @@ private:
 	void deleteMarkedLines();
 	void pasteToMarkedLines();
 	void deleteMarkedline(int ln);
+	void inverseMarks();
 	void replaceMarkedline(int ln, const TCHAR *str);
 	generic_string getMarkedLine(int ln);
     void findMatchingBracePos(int & braceAtCaret, int & braceOpposite);
diff --git a/PowerEditor/src/Notepad_plus.rc b/PowerEditor/src/Notepad_plus.rc
index 21776f7b2..a4cf7dbb3 100644
--- a/PowerEditor/src/Notepad_plus.rc
+++ b/PowerEditor/src/Notepad_plus.rc
@@ -325,6 +325,7 @@ BEGIN
         MENUITEM "Copy Bookmarked Lines",                  IDM_SEARCH_COPYMARKEDLINES
         MENUITEM "Paste to (Replace) Bookmarked Lines",    IDM_SEARCH_PASTEMARKEDLINES
         MENUITEM "Delete Bookmarked Lines",                IDM_SEARCH_DELETEMARKEDLINES
+		MENUITEM "Inverse Bookmark",                       IDM_SEARCH_INVERSEMARKS
     END
 
     POPUP "&View"
diff --git a/PowerEditor/src/NppCommands.cpp b/PowerEditor/src/NppCommands.cpp
index 952cbd13c..ca9192797 100644
--- a/PowerEditor/src/NppCommands.cpp
+++ b/PowerEditor/src/NppCommands.cpp
@@ -651,6 +651,10 @@ void Notepad_plus::command(int id)
 			deleteMarkedLines();
 			break;
 
+		case IDM_SEARCH_INVERSEMARKS :
+			inverseMarks();
+			break;
+
 		case IDM_VIEW_FULLSCREENTOGGLE :
 			fullScreenToggle();
 			break;
diff --git a/PowerEditor/src/menuCmdID.h b/PowerEditor/src/menuCmdID.h
index 5304c77c6..960eefdf1 100644
--- a/PowerEditor/src/menuCmdID.h
+++ b/PowerEditor/src/menuCmdID.h
@@ -153,7 +153,7 @@
 
     #define    IDM_SEARCH_SETANDFINDNEXT       (IDM_SEARCH + 48)
     #define    IDM_SEARCH_SETANDFINDPREV       (IDM_SEARCH + 49)
-    
+    #define    IDM_SEARCH_INVERSEMARKS         (IDM_SEARCH + 50)    
 
 #define IDM_VIEW    (IDM + 4000)                
     //#define    IDM_VIEW_TOOLBAR_HIDE            (IDM_VIEW + 1)