How does the value ever get changed then?
Put a small button next to it with a tooltip that says "Copy"
Put a second field over top of it (invisible) that only allows entry in browse mode, and either attach a script trigger to do the copy OnObjectExit, or make it a button that does the same thing.
this does not work i just found out that a field needs to be in browse more to be copied.
there is a enter brwose mode script step which could work if ther would be an exits browse mode script but i cant find something like that.
You can't "disable browse mode " by field. You can disallow entry into the field in browse mode. You could also use a script On Object Modify or On Object Keystroke which would disallow modification of the field but still allow selecting/copying.
i finally found a solution i used the clipboard function of the mbs plug-in which worked great.