Using Help

Clicking on the Help button will open the Help page corresponding to the current tab of the configuration window.
Once opened, the Help contents is synchronized when switching between the tabs.

A brief reference about any parameter is available if you click on the question mark on the configuration window title and then click on the parameter of interest.

The same reference about the current parameter can be obtained with F1 key.

The pop-up reference appears after the mouse cursor has hovered for a certain time over the parameter's area.
This delay (in milliseconds) is stored in Windows Registry:

[HKEY_CURRENT_USER\Software\Konstantin Khlopenkov\SpotRemover filter\Interface]
"HelpPopupDelay"=2500 
You can adjust that value according to your preferences.