I have an application with text boxes on a canvas, and I want to be able to resize them using the mouse; that means setting the height and width of the textbox in points rather than characters. Not having found anything on this subject here, I present my own humble effort: proc SizeText {w dx dy} { set font [$w cget -font] set width [expr ($dx-10)/[font measure $font "n"]] set height [expr ($dy-10)/[font metric $font -linespace]] $w config -width $width -height $height } where w is the textbox, and dx and dy are the width and height of the box in points, respectively. Notes: * This assumes that the text box only includes one font. * I use the width of the letter "n" as my conversion factor between characters and points. This seems to work but I have no idea what the real conversion factor should be. * The 10's should probably be replaced by twice the highlightthickness or something like that. [MG] Tk uses the number "0" for measuring the size of a font's characters, IIRC. <>Widget|GUI|Example