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I have some files with various line terminations of typically \x0d\x0a\x0d (CR,LF,CR) which need changing to \x0d\x0a (CR,LF). I have tried several things but only have success if I replace the original string to say "EOB" then run AFR again to replace "EOB" to the required \x0d\x0a string.
I also ...

Ok, I sorted the CR,LF thing - but how can I add characters at top and bottom of files?

Here I go again!
Now got the character at the top of files ok using Find \A and replace with \r"character".
This will not work at the end though using find \Z and replace with \r"character".
Can anyone give me the answer?