Akai MPC X User Manual page 268

The red arrow () on the left side of the list represents the audio playhead's current position. If your sequence is
playing, the arrow will move accordingly.
The following icons indicate the corresponding types of events:
Note
Track Mixer Automation (Volume, Pan, Mute, Solo)
Track MIDI CC Automation (0–127)
Track Parameter Automation (Aftertouch, Pitchbend, Channel Pressure, or Program Change)
Program Mixer Automation (Volume, Pan, Mute, Solo, or Send 1–4)
Program Parameter Automation (options vary based on the type of program)
Program Insert Effect Automation (options vary based on the effect)
Pad/Keygroup Mixer Automation (Level, Pan, Pad Mute, Pad Solo, or Send 1–4)
Pad/Keygroup Parameter Automation (options vary based on the type of program)
Pad/Keygroup Insert Effect Automation (options vary based on the effect)
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