Your problem sounds similar to:
https://www.chess.com/forum/view/help-support/why-is-my-chessboard-gigantic-so-i-can-only-see-half-of-the-board
https://www.chess.com/forum/view/help-support/the-board-is-out-of-the-screen
whats happenning to my ipad!?
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To day I suddenly experience that my ipad display only shows half the size of the board. It is impossible to play this way, as I dont see my side of the board. It happened both on my ipad mini and ipad 2. Any body else who experience this or know whats happenning and how lto solve the problem?