If during an interactive move the window or icon comes within proximity pixels
of another the window or icon, it is moved to make the borders adjoin.
--- a/.fvwm/config Mon Sep 24 23:04:11 2012 +0300
+++ b/.fvwm/config Sat Sep 29 20:33:10 2012 +0300
@@ -123,6 +123,10 @@
# Available: Fvwm, Mwm, Win.
MenuStyle "*" Mwm
+# If during an interactive move the window or icon comes within proximity pixels of
+# another the window or icon, it is moved to make the borders adjoin.
+Style * SnapAttraction 10
+
Style "*" !Iconifiable
# This disable ResizeOpaque, which cause frequent redrawing of applications.
Style "*" ResizeOutline