⭐ Merited by pooya87 (1)
could you quote the exact part from the doc where it says that? i honestly cant see it.
It says it after you tick the "BIP39 seed" checkbox under the "Options" pop up when importing a seed in to Electrum:
https://github.com/spesmilo/electrum/blob/a0b096dcb2292c2826f7beae173c529d335142f0/electrum/gui/qt/seed_dialog.py#L77