Creating a Fade-In
To create a fade-in:
1. Select the beginning of the clip that you want to fade in. The selection must extend to the exact beginning of the clip or a blank area prior to the clip in the track.
Selecting the beginning of a clip for a fade-in
2. Do one of the following:

Choose
Edit > Fades > Create.

Press Command+F (Mac) or Control+F (Windows).

To apply a Fade In using the Default Fade In setting (standard equal gain), and without opening the Fades dialog, press Command+Control+F (Mac) or Control+Start+F (Windows).
3. Select the fade-in curve and configure the other Fade settings.
4. Click the Audition button to audition the fade.
5. Adjust the curve by dragging it or by selecting a different shape from the In Shape pop-up menu.
6. Click OK.
The selected fade curve appears in the clip.