Swap colors on Autocad 2007

I have to swap colors like (e.g.)
red objects become blue objects
green objects become red objects
yellow objects become white objects
and so on.
I rememebered a specific command to do that, but I don't find it more (if
exist !).
How can I do ?
Bye

Marta

 

If you're doing what I think you are, you could type at the command
line: "change" the "'filter"<<notice the transparent portion>> then
select "color" in the select filter dialog box, then click on, select
to pick a color. Click add to list and then apply. You drop back to
the command line with a >>Select objects prompt to which you can enter
a crossing window or a for all then enter.
From there it's the same as the change command and use p for previous.
Be cageful and don't do what I did the first time...changed green to
yellow when I already had other lines that were yellow that I w3anted
to change.
R. Wink.