Comments are text associated with individual moves. You can add comments by typing them in the entry box (where the Control-A, Control-Z and Control-Y shortcuts can be used to manipulate text and undo changes). Comments are automatically stored whenever you move to another position in the game, or move the mouse away from the Comment Editor.
Comments may also exist at the start of a game or variation. To add a comment prefixing a variation go to the variation's first move; then move back one move before entering the comment.
With the focus in the Comment Editor, one can move the game forward and back by pressing the control+left/right keys. Control-Enter saves the comment and closes the window.
Scid uses the PGN Standard and NAGs for annotation symbols. While the most common symbols are displayed as Ascii characters (such as "!" or "+-"), others must be entered as the appropriate numeric value (ie - a number from 1 to 255). For example, the NAG value 36 means "White has the initiative" and will be displayed as "$36" in the PGN window.
The most common move evaluation symbols (!, ?, !!, ??, !? and ?!) can be added firectly from the main window by typing the symbol followed by the [Return] key. This is especially useful if you are entering chess moves using the keyboard.
In addition to text comments, Scid can also draw colour symbols and arrows on the board. In the Comment Editor, press to see a small board and diagrams.
Arrows can be done in two ways. In the Main Board, while holding Control, click on the start square then end square. Alternatively in the Comment Editor, arrows can be drawn (and erased) by dragging between two squares.
The technical format of arrows is: [%arrow fromSquare toSquare color] where fromSquare and toSquare are square names like d4.
Normally, the comments associated with these diagrams are hidden in the PGN window, but can be viewed by deselecting "Hide Square/Arrow Codes" in the PGN window options.
Click on any square in the Comment Editor board to add the selected colour/mark. The technical format is: [%mark square color] where square is a square name like d4 and color is any recognized color name (such as red, blue4, darkGreen, lightSteelBlue) or RGB code (six hexadecimal digits such as #a0b0c8). If the color is omitted, it defaults to red.
A comment may contain any number of color commands, but each must have in its own [%mark ...] tag. For example, the comment text Now d6 [%mark d6] is weak and the knight can attack it from b5. [%mark b5 #000070] will color d6 red and b5 with the dark-blue color #000070.