Inverts your view of the chess board for the duration of the
current game. Starting a new game returns the board to normal.
The F2 key is a keyboard equivalent.
Show Engine Output
Shows or hides a window in which the thinking output of any loaded engines
is displayed. The shifted Alt+O key is a keyboard equivalent.
XBoard will display lines of thinking output of the same depth ordered by score,
(highest score on top), rather than in the order the engine produced them.
Usually this amounts to the same, as a normal engine search will only find new PV
(and emit it as thinking output)
when it searches a move with a higher score than the previous variation.
But when the engine is in multi-variation mode this needs not always be true,
and it is more convenient for someone analyzing games to see the moves sorted by score.
The order in which the engine found them is only of interest to the engine author,
and can still be deduced from the time or node count printed with the line.
Right-clicking a line in this window, and then moving the mouse vertically with the
right button kept down, will make XBoard play through the PV listed there.
The use of the board window as 'variation board' will normally end when
you release the right button,
or when the opponent plays a move.
But beware: in Analysis mode, moves thus played out will be added to the game.
The Engine-Output pane for each engine will contain a header displaying the
multi-PV status and a list of excluded moves in Analysis mode,
which are also responsive to right-clicking.
Show Move History
Shows or hides a list of moves of the current game.
The shifted Alt+H key is a keyboard equivalent.
This list allows you to move the display to any earlier position in the game
by clicking on the corresponding move.
Show Evaluation Graph
Shows or hides a window which displays a graph of how the engine score(s)
evolved as a function of the move number.
The shifted Alt+E key is a keyboard equivalent.
Clicking on the graph will bring
the corresponding position in the board display.
Show Game List
Shows or hides the list of games generated by the last ‘Load Game’
command. The shifted Alt+G key is a keyboard equivalent.
Tags
Pops up a window which shows the PGN (portable game notation)
tags for the current game.
For now this is a duplicate of the ‘Edit Tags’ item in the ‘Edit’ menu.
Comments
Pops up a window which shows any comments to or variations on the current move.
For now this is a duplicate of the ‘Edit Comment’ item in the ‘Edit’ menu.
ICS Input Box
If this option is set in ICS mode,
XBoard
creates an extra window that you can use for typing in ICS commands.
The input box is especially useful if you want to type in something long or do
some editing on your input, because output from ICS doesn't get mixed
in with your typing as it would in the main terminal window.
Open Chat Window
This menu item opens a window in which you can conduct upto 5 chats
with other ICS users (or channels).
To use the window, write the name of your chat partner, the channel number,
or the words 'shouts', 'whispers', 'cshouts' in the upper field
(closing with <Enter>).
Everything you type in the lowest field will then automatically be sent to
the mentioned party, while everything that party sends to you will
appear in the central text box, rather than appear in the ICS console.
The row of buttons allow you to choose between chat;
to start a new chat, just select an empty button,
and complete the ‘Chat partner’ field.
Board
Summons a dialog where you can customize the look of the chess board.
Here you can specify the directory from which piece images should be taken,
when you don't want to use the built-in piece images
(see pieceImageDirectory option),
external images to be used for the board squares
(liteBackTextureFile and darkBackTextureFile options),
and square and piece colors for the default pieces.
Game List Tags
a duplicate of the Game List dialog in the Options menu.