i installed electrum wallet for rbf , i saw a tutorial of how to enable it , in every video they click on preference and they have a transaction tab where they can choose to activate rbf or not
RBF is opt-in and turn on with default settings in latest version of Electrum wallet. You don't need to turn it on (activate it) because the software does it for you but if you're careful, you can check that option and see it is ON or OFF.
Issues with RBF no longer being toggleable since Electrum 4.4 version.
Set the RBF flat to all transactions, and remove the 'use_rbf'why when i go in preference it don't show me the transaction tab ? how im supposed to activate rbf then
In Preference, there is no information on RBF but you can check it with your transaction.
You can try to send your bitcoin in a wallet from one address to another address that are all your addresses. Click Pay, then Preview, you will see Replace by Fee: True.
True means your transaction is RBF and you can Bump Fee later.