The HTC One A9 is an amazing smartphone and the only one that looks so much like the iPhone 6S. It comes with amazing specs for a high end phone. Here is a tutorial on how to take a screenshot on the HTC One A9 Aero.
How to take a screenshot on HTC One A9 :
Step 1: Go to the screen in which you want to take a screenshot.
Step 2: Now press and hold the power button, and then press the volume down button, and hold it for a few seconds.
Step 3: After step 2, you should see a notification bar message of screen capture saved in your gallery.
Step 4: Hitting the share icon will let you share it right away via text, or others apps like Whatsapp, Facebook etc.