Board window: Insert – Variations.
A variation is an alternative to the next text move. Basically you take back a move and enter another one instead. In the game notation the variation is given in brackets and indented.
A variation can be started by simply entering an alternative move, which automatically produces a variation window. You can also use the annotation palette or the actions available in the Insert – Variations menu:
Takes back the current move and allows you to add an alternate line (equivalent to pressing "T").
Ends the variation and jumps to the main line, so you can continue entering the moves of the main line.
Removes the current variation and all subvariations from the game. Ctrl-Z will undo.
The current variation is promoted to the next-higher level, and the variation there becomes the subvariation. Ctrl-Z will undo this action.
The moves of the variation replace moves in the game. Naturally all the rest of the moves must be legal, otherwise they are cut off.
Insert into game
Allows you to insert a number of moves into the game notation (see correcting moves).
The variations will be reorganized on the basis of chess criteria. The most important continuations become the main variations, i.e. all lines that have a large number of subvariations will be promoted at all levels to main variations.
This function merges variations from different parts of the game which go from the same position.