when I change a jump like JE ==> JNE the line highlight disapeard!!!
what shulde i do about it?????

options --> appearnce --> code highlighting ---> select your highligting scheme (viz jumps and calls) ---> select modified command ---->choose your back ground colour
done

when you undo it using alt+backspace to return to original code
use ctrl+ a (analyse) to get back the original background

very nice.
it fixed thanks.