Yamaha A3000 Owner's Manual page 12

4.7. Waveform display (Waveform)
This area shows a magnified portion of the currently opened sound file.
You can use the horizontal and vertical scroll bars to move the displayed
portion. You can also click on the overall waveform display (Overview) to
move the displayed area.
*For details on the overall waveform display, refer to "4.8. Overall
waveform display."
When a sound file is first opened or created, TWE creates waveform display
data that is separate from the actual sound data, in order to speed up the
waveform display. This waveform display data will be saved in the same file
as the sound data when the [File] menu command [Save As...] is executed, so
that even long sound files can be displayed immediately next time.
This waveform display data can be created in the background gradually (refer
to "8.3.3. Others" paragraph "Full scan on open," and "7.12. Waveform
Scanning"). At this time, the entire waveform is displayed in general
outline, and the display will gradually become more accurate. However,
display data for the portion that is actually shown in the waveform display
area will be given priority.
The portion in which the display data is still begin generated will be shown
in a different color than the portion which has already been completed
(refer to "8.3.1. Colors").
By dragging to left or right over a desired region of the waveform display,
you can select that region. If the selected region is not locked, clicking
in the waveform display area will defeat the previously selected region.
For sound data which contains two or more channels (stereo, etc.), you can
drag the mouse across the dividing lines between channels to simultaneously
select adjacent channels. Some operations which modify the length of the
waveform, such as the [Edit] menu command [Cut], cannot be executed unless
all channels are selected simultaneously.
If you press the Option key while the mouse cursor is located in the
waveform display, a cross-shaped cursor will appear. This is convenient when
you wish to use the time axis (Time Ruler) and amplitude axis (Level Ruler)
to learn the precise position of the mouse.
By holding down the Option key and dragging across the time axis (Time
Ruler) located above the waveform display, you can set the loop region.
Also, when you move the mouse pointer near the left (or right) edge of the
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