Gain

Allows you to change the gain, that is, the level of the selected audio.

The available options are:

Gain: Allows you set a gain value between -50 dB and +20 dB.
Clipping detection text: This text is displayed if you use Preview and the gain setting results in audio levels above 0 dB.

Note
In case of clipping, lower the Gain value and use the Normalize function instead. This allows you to increase the level of the audio as much as possible without causing clipping.