Click on the <span class="guimenu">[[!img lib/list-add.png alt="Create partition" class="symbolic" link="no"]]</span> button to create a new partition on the device.
If you want to create another partition in the free space on the device, click on the free space and then click on the <span class="guimenu">[[!img lib/list-add.png alt="Create partition" class="symbolic" link="no"]]</span> button again.
Click on the partition displaying a [[!img lib/network-wireless-encrypted.png alt="Partition LUKS" class="symbolic" link="no"]] in the bottom-right corner.
Click on the [[!img lib/system-run.png alt="Additional partition options" class="symbolic" link="no"]] button and choose **Change Passphrase** in the shortcut menu.