The Assembly viewport provides functionality for selection, locking, and 'pick walking' up and down a hierarchy with the keyboard arrow keys.

The Color Picker viewport is a dedicated window for editing colors and creating schemes for scenes, which can then be easily applied when surfacing, setting up lights, and any other color-related operation.

The Display viewport offers the ability to control how individual items appear within a 3D Viewport, overriding the viewport style itself.

The Gradient Editor viewport offer the ability to control gradient textures in Modo.

The Graph Editor viewport controls how the system interpolates key values.

The Groups viewport is a workflow streamlining tool, allowing the ability to easily control multiple items and/or channels within a scene. It also provides a number of functionalities to speed up common tasks, such as setting keyframes for complex hierarchies.

The Preset Browser viewport is a visual reference to a library of pre-defined objects, surfaces, and settings, which are included with Modo.

The Preview viewport uses the Modo render engine in a progressive refinement mode that allows you to see all changes in a scene with a fully rendered image.

The Render Display viewport provides a variety of useful options and feedback for working with the resulting rendered pixels for any Modo scene.