kHs Reverser does delay and reverse sections of the input sound resulting in anything from hauntingly eerie textures to reverse percussion hits.
The amount of time before the delayed sound starts playing. This will be expressed in milliseconds or as parts of a beat, depending on the Unit setting.
When Unit is set to 'Sync' the delay time will be synchronized to the song tempo.
Time to ramp in/out the reversed audio to avoid any clicks and pops, in percent of the reversed section length.
The dry/wet mix of this effect. A lower value will let some of the unmodified signal through.
Whenever you have your mouse cursor over a snapin there is a small arrow at the top right corner (not visible in screenshot). It opens a settings panel where you handle presets.
It also has a "randomize" button that can be useful. I guess...
The bottom right corner of all Kilohearts plugins is a resize handle for scaling the UI to any size. This allows you to get a good view of the controls whatever the screen resolution, and also comes in handy if you need big controls, e.g. when using Reverser as a real-time effect on a touchscreen monitor during a live set. (This is not available when the snapin is used inside a snapin host.)