<p>tails-dev@boum.org is the mailing list where the project is coordinated: technical design questions, upcoming events, monthly reports, and user experience.</p>
Turn on the [[Electrum Bitcoin Wallet|persistent_storage/configure#electrum]] feature of the Persistent Storage to store your bitcoin wallet and preferences across separate working sessions.
[[!img install/inc/screenshots/grub.png class="screenshot" alt="Black screen ('GNU GRUB') with Tails logo and 3 options: 'Tails' and 'Tails (Troubleshooting Mode)' and 'Tails (External Hard Disk)'."]]
To change the security level, select the [[!img security-level.png link="no" class="symbolic"]] icon on the right of the address bar and choose **Settings**.