Visualizer
Visualizer we ship is essentially a separate executable which opens GLFW window and renders frames using projectM visualizer.
When you open it, it also opens a dialog window for changing Visualizer options.

You can toggle visualizer fullscreen by double-clicking its window.
FPS
You can set the desired FPS for the visualizer. By default it's set to the FPS of the screen where it opens.
Mesh Width and Mesh Height
Mesh width and height control the appearance of the textures, you can play around with those.
Load random preset with each new track
In order for this feature to work, you must set random preset directory and ensure it has presets in it.
When each new track opens, visualizer will load a random preset.
Load Preset
Opens a dialog window for you to select a .milk preset.