17.6 The overtrace command
This command is used to display a XAS data file over the current plot (which must
be of the same type). It is of course care of the user to ensure that one is plotting
data which is in the same x and y range as the data on the screen !
The colour of the plot for the "xw" server, unless the user
is obtained cycling through the fundamental colours (since the first plot defaults to white, one than has green, blue, cyan, magenta, yellow, white, red and again).
The command can be invoked exactly with the same syntax as the