Assigning Track Icons in the Track Parameter Box
Logic Pro offers high-resolution, scalable (from 128 x 128 pixels downward), and user-definable track icons.
Click an existing track icon in the Track Parameter box, and choose the icon you want from the grid.
You can create your own icons for tracks. User-created icons are saved in the following folder: ~/Library/Application Support/Logic/Images/Icons.
These icons must have the following attributes:
128 x 128 pixels in size
An alpha channel for transparency
Must be saved in the portable network graphics format (with the .png suffix)
Must be given a filename that starts with a three-digit number
Note: If this number is identical to the number of one of the built-in Logic Pro icons, the icon found in the user folder is given priority.
You also have the option of directly replacing the built-in Logic Pro icons, which are found in the /Contents/Resources/Images folder in the Logic Pro package.
Control-click (or right-click) the Logic Pro icon in the Finder, then choose Show Package Contents from the shortcut menu.