idlwave-shell-stop-line-face

idlwave-shell-stop-line-face is a variable defined in `idlw-shell.el'.
Its value is

highlight

Documentation:
The face for `idlwave-shell-stop-line-overlay'.
Allows you to choose the font, color and other properties for
line where IDL is stopped. See also `idlwave-shell-mark-stop-line'.

You can customize this variable.