3D Object Panner parameters in Logic Pro for Mac
3D Object Panner window
Although you can position the pan puck using the 3D Object Panner control of the channel strip or track header, you can access more parameters and controls when you open its corresponding 3D Object Panner window.
Click the Link button 
to update the window showing the pan control of the currently selected track. You can also open multiple 3D Object Panner windows simultaneously (to show the settings of multiple object tracks) and save them in screensets.
The 3D Object Panner window contains two grids. Change the position of the puck in the upper grid to move the object left, right, front, and back. Change the position of the puck in the lower grid to move the object left, right, up, and down. Mono objects are represented by a single pan puck. Stereo objects are represented by three pan pucks: a puck for the left (L) signal, a puck for the right (R) signal, and a third puck (a dot) that represents the middle of the stereo image and controls both the L and R pucks as a group. Stereo objects also have a Spread parameter that controls the stereo width of the signal.
Although both the Surround Panner and the 3D Object Panner can route an audio signal in the three-dimensional sound field, the 3D Object Panner has some significant differences:
Creating a pan position generates metadata that is sent separately from the audio signal to the same corresponding object input of the Dolby Atmos plug-in.
The three-dimensional position where you place the signal with the pan puck has no reference to a specific speaker setup and is only referenced to a XYZ coordinate in the three-dimensional space.
There is no option to route the signal to the LFE channel.
The 3D Object Panner can’t be used on surround tracks, only on mono tracks or stereo tracks.