Am 08.11.2016 um 22:37 schrieb Junio C Hamano: > Are all semi-modern Tcl/Tk in service have this -undo thing so that > we can pass unconditionally to the text widget like the patch does? Good point. As far as my research goes, this flag was introduced in Nov. 2001: http://core.tcl.tk/tk/info/5265df93d207cec0 To defend Gitk developers, the Tk guys apparently change their mind on the default value from time to time. Official documentation says nothing about a default, the proposal from 2001 talks about -undo 0 as default and there are recent commits changing this default: http://core.tcl.tk/tk/info/549d2f56757408f3 Markus -- - - - - - - - - - - - - - - - - - - - Dipl. Ing. (FH) Markus Hitter http://www.jump-ing.de/