How to remove balloon/ripple effect while entering pin on lock screen? Recently I updated my phone to android lollipop. When I type my pin in lock screen a balloon/ripple effect or a circular thing is observed near the key which I pressed/touched. I don't want that effect in my mobile. Can I remove it without rooting my phone?
Without rooting there are 2 ways at least. Neither are that great, but they do produce the desired behaviour.
Developer Settings

Activate developer settings by tapping the build number 7 times
Adjust the animation speed (Animator Duration Scale). Either make it much faster or disable it completely

This has the downside of disabling all the lovely material design animations universally :/ Fortunately, transitions can still be preserved so it isn't all that terrible.
Power-Saving Mode
This is essentially toggling power saving mode as required because this too will disable the lockscreen ripple animation. Whilst it also disables all animations, this may be preferable as it's easier to toggle (fewer taps) than digging into developer settings.
Rooting
Rooting and installation of xposed for Lollipop is of course much more preferable, and opens up many more options, but without that, you still have the above two options.