Akai DPS 24 Reference Manual page 68

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EDIT MODE
Using SHIFT+CURSOR LEFT/RIGHT, you may zoom in/out on the waveform horizontally:
At any resolution, you can use the numerical keypad's +/- keys or the Q5 knob, to nudge the
NOW time forwards or backwards by one pixel increments to fine tune your edit points.
At the maximum horizontal zoom, one pixel of the LCD represents one sample.This means
that you can set sample accurate edit points.
User Guide