File examples/diagrams/draw_anchor.tcl from the latest check-in
package require Tk package require Diagrams namespace import ::Diagrams::* pack [canvas .c -width 200 -height 120 -bg white] drawin .c direction southeast currentpos [position 20 20] arrow "" 40 box " A " direction southeast currentpos [position 120 20] arrow "" 40 attach northwest box " B " saveps anchor.ps