Bored of your device's screen being to dim and constantly rotating when scanning your e-tickets ? This Quick Settings tile for Android 6 and up is made for you:
It will let you lock the screen rotation and ramp up the brightness in an instant, and then restore your screen rotation setting and favourite brightness once the scanning process is over.

Other than the tile itself, you will find a comprehensive guide to enable it in a flash.

This application is open source. If interested, you may find the code here: https://github.com/vguillou/eticket-tile

Disclaimer: Some manufacturers (Samsung, Asus,...) do not enable custom Quick Settings tiles on their version of Android. Therefore, some devices may be incompatible with this application. It is not a bug but a limitation that, unfortunately, no app developer can circumvent. :(