Akai MPC 5000 Reference Manual page 89

Like the 'Now' field in the MAIN page, it displays the current time
position of the sequence.
Like the 'Sequence' field in the MAIN page, you can select a sequence in this field.
The sequence list is displayed under the 'Now' field and the 'Sequence' field.
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The number and name of the selected sequence will be displayed below the
Sequence list as shown in the image to the right. The MPC5000 will switch to the
next sequence after it plays the current sequence to the end.
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The MPC5000 will switch to the next sequence at the point the button is pressed.
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The button will be highlighted and the MPC5000 will keep playing back the current sequence, instead of switching to the next sequence.
If you press the [F5] (HOLD) button again, the Hold function will turn off and the MPC5000 will switch to the next sequence after it finishes playing
back the current sequence.