You can swipe down to bring up the menu, go to the settings page and fill in the form in [Feedback], which you can of course write by hand, and send it along with the system log. Our support team will get back to you as soon as possible.
*Perhaps if your cursive writing was a little neater, we would be able to recognize it more quickly :)
On-device feedback is only available on the A5 X and A6 X. For A5 and A6 Agile users, please email feedback to firstname.lastname@example.org