in http://hand2note.com/Home/Features there is a feature "Watching all important showdowns while playing" refering to some hands counter.
Can you pls explain how this hands counter is working or how to configure it to use it on the table
You can add the Hands Counter in your HUD with a right-click on empty cell:
Select any desired stat for the Hands Counter. For example, 3bet:
Then during the game, as soon as the player makes 3bet it will be displayed in the Hands Counter:
Hovering mouse at the Hands Counter will reveal the Hand View: