The notification panel on the Sony Xperia Z1 lets you add limited number of quick settings toggle button to switch the system settings on/off right from the notification panel.
To customize Notification Panle on Xperia Z1 do as follows:
1. Open Settings application
2. Under Device settings, go to Personalization.
3. Tap Quick Settings.
4. Now mark the quick settings buttons you want to have access to, from the notification panel
5. Tap the Order icon next to the name, to re-order the quick settings buttons