It's at the top of the menu. Again, you'll find this option at the top of the menu. This will allow Resident Evil 6 to pick up from the last saved checkpoint. If you want to select a specific level, select CHAPTER SELECT and then select a campaign and a level instead. Select the SCREEN MODE option, then switch it to SPLIT by pressing right on the controller's right analog stick. If you're on PC, you can click the right-facing arrow next to SINGLE to do this. Press A (Xbox) or X (PlayStation) on your controller, or press ↵ Enter on a PC. Select the character to use, then press the "Start" button on their controller or ↵ Enter on a PC. It's at the bottom of the screen. Your Resident Evil 6 co-op game will begin.

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Write a summary of the previous text in Chinese:
选择开始游戏。 选择战役。 选择继续。 更改屏幕模式。 选择确定。 让另一名玩家选择角色。 选择开始游戏。