To automatically open a locally stored manual (*.pdf or *.txt) for the current
chess engine, use the menu option 'Help > Open Chess Manual' in the engine window.

This option works as follows:
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1) It looks for a file 'Manuals.txt' in the folder 'CB-Emu\manual' - if this file
   does not exist, it will be recreated from the template 'Manuals.lst'.
2) This file is then searched for the name of the current chess engine (#engine#) -
   if the engine name is not found, then a new entry '#engine#' is added at the end.
3) If the name (including path) of an existing manual is found in the following line,
   then this file will be opened automatically.
   If no such entry exists or if the file cannot be found, a file dialog will open
   where you can search for the desired manual yourself - the name of this manual file
   (including path) will then be automatically added to 'Manuals.txt'.

Important remarks:
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1) In the 2nd line of 'Manuals.txt' (after [MANUAL_PATH]) you can optionally enter the
   full path to your chess manuals folder as starting directory in the file dialog.
2) If you accidentally selected a wrong manual for a chess engine in the file dialog,
   you have to delete this incorrect entry in 'Manuals.txt' yourself, otherwise this
   wrong manual will be automatically loaded again in the future.
3) In future CB-Emu updates, you should copy an existing 'Manuals.txt' file from the
   previous CB-Emu version into the new 'CB-Emu\manual' directory to avoid losing
   existing entries for chess manuals.