Change the gain of audio regions in Logic Pro for Mac - Apple Support

You can change the gain of audio regions with the Gain tool, or in the region or cell inspector.

Gain plug-in in Logic Pro for Mac - Apple Support

The Audio Track Editor in Logic Pro for Mac - Apple Support

Change the Audio File Editor waveform amplitude scale in Logic Pro for Mac - Apple Support (IS)

Advice for track volume changing on its own : r/Logic_Studio

Apple Updates Logic Pro With New Gain Tool, ML-Based Smart Tempo Analysis, More - iClarified

Space Designer Output EQ in Logic Pro for Mac - Apple Support (GE)

Notifications settings in Logic Pro for Mac - Apple Support

General Audio settings in Logic Pro for Mac - Apple Support

Work in the Cell Editor in Logic Pro for iPad - Apple Support

Audio Editing settings in Logic Pro for Mac - Apple Support

Group Settings window in Logic Pro for Mac - Apple Support

My Info settings in Logic Pro for Mac - Apple Support

Change the gain of audio regions in Logic Pro for Mac - Apple Support (GE)

Multichannel Gain in Logic Pro for Mac - Apple Support