add -under for button

[cuu]

trafficstars

add -under for button to use for like

button .b1 -text "BTN" -under 0 -width 6 -command { exec xmessage "hello" }

[visualfc]

add -under for button to use for like

button .b1 -text "BTN" -under 0 -width 6 -command { exec xmessage "hello" }

this -under or -underline ? https://www.tcl.tk/man/tcl8.6/TkCmd/ttk_widget.html#M-underline

[cuu]

Sorry for the mistake

it seems -under is the -underline and does atk support -underline with button ?