Hi star1uk2008,
Sorry, we're afraid the screenshot method and camera shutter method are expected designs in ZB602KL and may not be adjusted at this moment.
If you wish to give us suggestions,
you can share your ideas in the Idea For Next section,
the ideas there will be highly considered in our phone design.
https://www.asus.com/zentalk/forum.php?mod=forumdisplay&fid=46
For ZenMotion touch gesture, you can find touch gestures such as Double-tap to turn off/wake up screen and swipe up to wake up in Settings > System > Gestures > ZenMotion.
For ZenMotion motion gesture, may we understand what kind of gestures are you referring to?
Thank you 🙂