~/.Xdefaults
file.
For example: If you prefer to have a white background in text panes (input, log, editor), add
this line to your ~/.Xdefaults file:
idlde*XmText*background: whiteThe change will take effect the next time you log in. To make it effective immediately, use the following UNIX command:
xrdb ~/.Xdefaultsand then restart IDLDE.