By default, event handles become visible when you move the mouse pointer to an event or select events.
You can choose when to display fades, event volume curves, and event volume controls in the Preferences dialog (Event Display—Audio page).
In the upper left and right corners, you can find triangular fade handles that allow you to change the fade-in or fade-out length. The event volume control at the bottom left allows you to change the volume.
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To change the fade-in length, drag the fade handle to the right or to the left.
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To change the fade-out length, drag the fade handle to the left or to the right.
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To change the event volume, click the event volume control and move the fader.
Changes affecting fades or the volume are reflected in the event waveform and on the info line.
To change the event volume and the fades with the mouse wheel, activate Use Mouse Wheel for Event Volume and Fades in the Preferences dialog (Editing—Audio page). To move the fade-in end point, press Shift while moving the mouse wheel, and position the mouse pointer anywhere in the left half of the event. When the mouse pointer is in the right half of the event, the fade-out start point is moved.