Diabolical fingers

The program is designed to teach ten‑finger “touch typing” while chatting in messengers. It takes the form of a virtual keyboard and displays the user’s key presses. Keys assigned to different fingers are highlighted in different colors. When the mouse cursor hovers over the application window, the window disappears, but it reappears as soon as the first key is pressed. The window can also be manually activated/deactivated using the Ctrl‑? key combination.