Yamaha A3000 Owner's Manual page 28

Maximize the vertical display resolution.
<Vertical Full Zoom Out>
Minimize the vertical display resolution.
<Horizontal Full Zoom In>
Maximize the horizontal display resolution.
<Horizontal Full Zoom Out>
Minimize the horizontal display resolution.
<Fit To Selection>
Change the resolution so that the selected region fits within the waveform
display.
<Fit To Loop>
Change the resolution so that the loop region fits within the waveform
display.
<Previous Zoom>
Return to the previous resolution setting.
7.3. Selection
<Select Loop>
Select the currently specified loop region as the selected region.
<Selection to Loop>
Specify the currently selected region as the loop region.
7.4. Auto Snap
When the start/end points of the selected region or loop region are newly
set or changed in the waveform display, Auto Snap will automatically move
these start/end points to the nearest sample location of the specified
level. Three types of Auto Snap setting can be selected.
<None>
Auto Snap will not occur.
<Zero Cross>
The start/end point will be moved to a zero-cross point (a point where the
level intersects the center line of the waveform display).
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