File to Edit to add backplot tabs

awhile back i edited the file to add another tab in emc2.4 and i forgot which one.
can someone give me the location ?
Thanks

thanks, but which ? what folder ?

well i found i edited the axis.tcl file to add the tab.
is this the wrong file since John said ini file ?

just using gedit. ngcgui uses axis.ini ?
ngcgui is something to install ?

i tried ngcgui before but could only use it in sim mode.

cool, thanks. did all dat and i get unable to open file (simp,slot or iquad)
on either tab.just have the three. files are in those folders. can open file with
np. error is while opening this file /home/mill/emc2/configs/Axis/auto.ngc

ini
USER_COMMAND_FILE = tkapp.py
TKAPP = ngcgui_app.tcl
NGCGUI = ngcgui.tcl
NGCGUI_FONT = Courier -10 normal
NGCGUI_PREAMBLE = /home/mill/nc_files/in_std.ngc
NGCGUI_SUBFILE = /home/mill/nc_files/slot.ngc
NGCGUI_SUBFILE = /home/mill/nc_files/simp.ngc
NGCGUI_SUBFILE = /home/mill/nc_files/iquad.ngc
NGCGUI_OPTIONS = nonew noremove nonew


don't know why i can't find this(and others) in searching.
i do search before asking.