When activated, an indicator shows up on the display.
Description
The 2nd function button is used to change the function of a button when clicked.
Usually, the 2nd function is the inverse of the function the button is assigned to. The exact function is displayed in gray above each button. You can find more information about the function and 2nd function of a button when hovering over the button with the mouse.
You can also use the 2nd function of a button using the right mouse button.
