Padshop 2 Previewer

Can someone explain what the Previewer is supposed to do in Padshop 2? I assumed that if I select a preset, then click the Previewer button, it would play a sample of that preset without having to load it first. But it doesn’t seem to do anything at all. No mention of this feature anywhere in the online manual.

What am I missing? Maybe this feature does something other than what I am expecting.

the previewer is explained in the Cubase manual

if you open media bay with F5 you can select presets and play them with your keyboard before you decide to load the preset but if you are choosing from padshops media bay it will always change the preset on the synth