Critical positions
Menu: Insert - Annotations – Special annotation
You can also right-click the notation and use Special annotation.

Label positions according to the following scheme:
 Critical position – opening
    Critical position – opening
Marks the current move in blue.
 Critical position – middlegame
    Critical position – middlegame
Marks the current move in red.
 Critical position – endgame
    Critical position – endgame
Marks the current move in green.
You can use the search mask to find games which contain critical positions.