.It Ic border_width
Set window border thickness in pixels.
Disable all borders by setting to 0.
+.It Ic boundary_width
+Set region containment boundary width in pixels. This is how far a window
+must be dragged/resized beyond the region edge before it is allowed outside
+the region. This has no effect when manipulating the window with key
+bindings. Disable the window containment effect by setting to 0.
.It Ic clock_enabled
Enable or disable displaying the clock in the status bar.
Disable by setting to 0
.Xr xterm 1
binary without the setgid bit set.
.It Ic tile_gap
-Pixel width of empty space between tiled windows.
+Pixel width of empty space between tiled windows. Negative values cause overlap.
+Set this to the opposite of border_width to collapse the border between tiles.
Disable by setting to 0.
.It Ic title_class_enabled
Enable or disable displaying the window class in the status bar.