Application preview

Hi,
I clicked on something in show hidden icons task bar that caused a preview of open applications to appear in the right side bar area of the screen in the gadgets area.
If I rt click it the options are:
Always show this process
Always on top
Opacity
Process
Minimize Window
Close window - this closes the application

I don't want this and I need help in deactivating it
Thanks
Frank C
Windows 10 Hp Envy

I got rid of it:
Rt click sidebar > Select options > Click View Tab > untick Show Window-Manager

Frank C said:

I clicked on something in show hidden icons task bar that caused a preview of open applications to appear in the right side bar area of the screen in the gadgets area.

Windows 10 does not have "gadgets" or "gadgets area". Whatever "gadget area" you have on your desktop is a product of a third-party software, which has nothing to do with Windows. You have to specify what software it is if you want to ask questions about it.