The size of the grid cells. Default 70 pixels.
.TP 8
.B \-ibw \fIpixels\fP
-The size of the "gutter" between grid cells. Default 1 pixel.
+The size of the "gutter" between grid cells. Default 4 pixel.
.TP 8
.B \-increment \fIpixels\fP
How many pixels by which a piece should be moved when sliding to a new