Bip39 Seed Phrase. Push X to abort passphrase application and hold editing the passphrase. Deciding on CANCEL immediately after an abort will halt the process. BIP39 is a style implementation that lays out how copyright wallets produce the set of words (or "mnemonic codes") that make up a mnemonic sentence, https://ledbookmark.com/story5178316/bip39-passphrase-https-linktr-ee-bip39-bip39-wallet-fundamentals-explained