> Uwe Brauer composed on 2017-08-02 08:18 (UTC): > If Trinity Control Center's peripherals display size & orientation screen's It did not but xrandr returned someting. > select list of settings for screen doesn't allow other than screen 1, then > install arandr from Ubuntu's standard repos and try it. Thanks for pointing that out, meanwhile I obtained the relevant xrandr command for my setting. Uwe Brauer