I've used Blender 2.7 for years, but I'm really trying to make an effort to figure out 2.8.
I was trying to randomize my vertices in edit mode; so I searched Preferences > Keymap for the shortcut to do this. Sure enough, it appeared as the following:
But what is tweak?? I'm guessing it's some hidden menu or something?? I've Googled for awhile, and cannot find anything about this.