"Google Now" swipe from Home button is not working in Marshmallow After updating to Marshmallow I was playing around with settings. I don't know what I changed, but now when I swipe from the bottom, "Google Now" is not coming.

I used to assign that with Greenify to lock the screen. How to get it back?
There are actually 2 issues here:


No swipe from Home button gesture
Cannot change the action from Google Now to other apps (e.g Tasker, or Greenify)


The first issue is caused to accomodate a new feature called Now on Tap. Now, instead of swiping the Home button, you just need to hold it to access Google Now screen (or "Now on Tap", if enabled). AFAIK, this behaviour cannot be changed natively (enabling/disabling "Now on Tap" doesn't affect this).

The second issue is caused by the addition of explicit setting for assist app (before Marshmallow, you need to clear defaults the app that you assign to before). The setting can be accessed from Settings - Apps - Advanced (cog wheel icon) - Default Apps - Assist &amp; voice input - Assist app. By default, it is "Google App" (i.e. Google Now), and you can change to any apps that support this feature (i.e. Tasker, for my case).