2 files changed, 4 insertions, 1 deletions

diff --git a/data/init.in b/data/init.in
index c0bb93a..86cfa08 100644
--- a/data/init.in
+++ b/data/init.in
@@ -30,4 +30,4 @@ session.colorsPerChannel:	4
 session.doubleClickInterval:    250
 session.cacheMax:       200
 session.imageDither:    True
-session.configVersion:  6
+session.configVersion:  7
diff --git a/data/keys b/data/keys
index a8c7cba..8b2a234 100644
--- a/data/keys
+++ b/data/keys
@@ -15,6 +15,9 @@ OnToolbar Mouse5 :PrevWorkspace
 OnWindow Mod1 Mouse1 :StartMoving
 OnWindow Mod1 Mouse3 :StartResizing
 
+# middle click a window's titlebar and drag to attach windows
+OnTitlebar Mouse2 :StartTabbing
+
 # double click on the titlebar to shade
 OnTitlebar Double Mouse1 :Shade