You can use Enigmail's key management window to import and export keys. If you want to be able to read your encrypted email on a different computer, you will need to export your secret key from here. Be warned, if you transfer the key without encrypting the drive it's on the transfer will be dramatically less secure.
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You can use Enigmail's key management window to import and export keys. If you want to be able to read your encrypted email on a different computer, you will need to export your secret key from here. Be warned, if you transfer the key without encrypting the drive it's on the transfer will be dramatically less secure.