The Play user interface area displays a toolbar with buttons that perform various actions. An overview of the general toolbar organization is given in the next section, while the section after that provides a reference of all the buttons that can appear in the toolbar, and what they do.
Toolbar organization
This is how the Play area toolbar looks like on an iPhone when you hold the device in portrait orientation. On the iPad the toolbar is wider but in general has the same content.
The toolbar has 3 areas:
The left area of the toolbar shows a varying set of buttons. Which buttons are shown mainly depends on the mode that is currently active in the Play area is in (e.g. Play mode, Scoring mode, etc.).
At the toolbar center there is the Status Text area that shows context information about the activity that is going on at the moment. Some examples are: The current status of the ongoing game, the next action you can take, a summary score, etc.
The right area of the toolbar is fixed and always shows the same two buttons: One to call up the Game Info screen, the other to call up the Play menu.
When you hold the device in landscape orientation the user interface does not show a toolbar at the top of the screen. Instead the user interface shows the toolbar content in the following places:
The buttons in the toolbar’s left (①) and right (③) areas are shown in a button box at the bottom-right corner of the screen, as is depicted in the next image.
The Status Text is displayed in the upper-left corner of the screen (not shown here).
The reason for the different landscape layout is that in landscape orientation there is not a lot of vertical screen space, so the space that is available is put to better use by drawing the Go board slightly larger.
The following buttons can appear in the left toolbar area while Play mode is active in the Play area.
Icon
Name
Description
Pass
Tapping this button plays a pass move.
Computer Play
Tapping this button lets the computer play a move on behalf of the current player.
Suggest Move
Tapping this button lets the computer make a suggestion how to play. Unlike the Computer Play button, which immediately plays a move, it is up to you whether you want to actually play the suggested move, or ignore the suggestion. This button replaces the Computer Play button if the “Computer assistance” preference is set to “Suggest move”.
Discard Node
Discards the most recent node (typically a move) that led to the board position that you are currently viewing.
Pause
This button is only shown in a computer vs. computer game. Tapping the button lets the computer player whose turn it is finish the move, then pauses the game.
Continue
This button is only shown in a computer vs. computer game, when the game is paused. Tapping the button lets the computer players continue with the paused game.
Interrupt
This button is shown whenever the computer player is calculating something, e.g. when it is thinking about its own move or when it tries to come up with a move suggestion for you. Tapping the button cuts short the computer player’s thinking, forcing it to play or suggest the best move it has calculated so far.
Scoring Mode
Tapping this button activates Scoring mode. The button is shown only if the game has ended and the Play area is in Play mode.
Scoring mode
The following buttons can appear in the left toolbar area while Scoring mode is active in the Play area.
Icon
Name
Description
Play Mode
Tapping this button leaves Scoring mode and instead activates Play mode.
Discard Node
Discards the most recent node (typically a move) that led to the board position that you are currently viewing.
Board setup mode
The following buttons can appear in the left toolbar area while Board setup mode is active in the Play area.
Icon
Name
Description
Switch Setup Stone Color to White
This button is displayed when the default color for new setup stones is currently black. Tapping the button switches the default color for new setup stones from black to white.
Switch Setup Stone Color to Black
This button is displayed when the default color for new setup stones is currently black. Tapping the button switches the default color for new setup stones from black to white.
Discard all Setup Information
This button is displayed only if there is at least one piece of setup information present (at least one setup stone is on the board, or a side to play first has been set up). Tapping the button discards all setup information.
Play Mode
Tapping this button leaves Board setup mode and instead activates Play mode.
Markup editing mode
The following buttons can appear in the left toolbar area while Markup editing mode is active in the Play area.
Icon
Name
Description
Variable
Select Markup Type
Tapping this button pops up a menu that lets you choose what kind of markup you want to place from now on when you interact with the board. The icon used for the button is variable and reflects which markup type is currently selected. See the table below for details.
Discard all Markup
This button is displayed only if there is at least one piece of markup present in the current node. Tapping the button discards all markup.
Play Mode
Tapping this button leaves Markup editing mode and instead activates Play mode.
These are the markup types that you can choose from when you tap the Select Markup Type button:
Icon
Name
Description
Circle Symbol
Places a Circle symbol on the board.
Square Symbol
Places a Square symbol on the board.
Triangle Symbol
Places a Triangle symbol on the board.
X Symbol
Places an “X” symbol on the board (“X marks the spot”).
Checkmark Symbol
Places a “Selected” symbol on the board. The style used for rendering the symbol is a checkmark. Which style is currently used for rendering the “Selected” symbols is a user preference.
Dot Symbol
Places a “Selected” symbol on the board. The style used for rendering the symbol is a dot. Which style is currently used for rendering the “Selected” symbols is a user preference.
Number Marker
Places a single-digit number marker on the board.
Letter Marker
Places a letter marker on the board. Letters used are in the ranges a-z and A-Z.
Label
Places a text label on the board.
Line
Places a line between two intersections on the board.
Arrow
Places a line between two intersections on the board. The line is rendered with an arrow head to indicate the direction.
Eraser
Deletes markup on a single interaction, or on all intersections within a rectangular area.