Maybe it's just because I don't understand how this all works....
I set up encryption using enigmail on one computer, so I now have a key pair, and a password set up so that I sign in to encrypt a message with my secret key.
I'm now setting up enigmail on a second computer. I've downloaded my public key from a keyserver, but can't work out how to set up the secret bit again. I thought I could just sign the public key using my password, but when I try to do this, using key management/edit/sign key, there is nothing in the box: key to be signed, so maybe that's not the right thing to do.
Any help/advice/pointers to where this info can be found would be much appreciated.