Navigating the menu

SD2PSX implements a simple menu-based navigation system. Five "gestures" are supported with the two exposed buttons:

• Left / Up / Previous Channel: Short press the left button
• Right / Down / Next Channel: Short press the right button
• Back / Previous Card: Long press the left button
• Confirm / Next Card: Long press the right button
• Menu: Press both buttons at the same time by holding one button down and then quickly pressing the other button