[Guy Harris <guy@xxxxxxxxxx>]

> Is it possible to cut and paste from an etheral packet decode display?

No.

> The Edit menu has the options, but they are greyed out.

That's because there does not exist any code to implement them.  Some
form of cut-and-paste may be implemented in the future if somebody decides
to implement it.

> I want to do this, as I wish to include an extract from a packet trace
> in an email so as to show connection problems to a site.

You could try using "Print..." and print the relevant packets to a file,
instead, and then incorporate the file into your email.