[[!meta title="Modifying the boot options using the Boot Loader"]]

The Boot Loader is the first screen that appears when Tails starts.

You can use the Boot Loader to modify the *boot options*. Boot options are special parameters used to troubleshoot or work around hardware support problems. For example, our [[list of known issues with graphics cards|support/known_issues/graphics]] documents boot options for different graphics cards.

Depending on the computer, the Boot Loader might be either *GRUB* or *SYSLINUX*.

[[!img english_us_keyboard.png alt=""]]

Using *SYSLINUX*

This is what *SYSLINUX* looks like:

<p>If your Boot Loader looks different, refer to our instructions below on
modifying the boot options [[using GRUB|boot_options#grub]].</p>

</div>

To modify the boot options in *SYSLINUX*:

<!-- Keep in sync with install/inc/steps/restart_first_time.inline.mdwn. -->

Modify the boot options as needed.

[[!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)'."]]

<div class="bug">

<p class="command">sudo mount -o remount,rw /usr/lib/live/mount/medium/</p>

<p class="command">gnome-text-editor admin:/usr/lib/live/mount/medium/syslinux/live64.cfg</p>

<p class="command">gnome-text-editor admin:/usr/lib/live/mount/medium/EFI/debian/grub.cfg</p>