There are several distinct areas where buttons appear on your screen.
These give you access to all of the major functions of the product.
Additionally, there are a few additional user interfaces that appear when needed.
Left clicking on any Asset within the Virtual Environment will bring up the Asset Interface. This interface shows all relative information pertaining to the selected asset and provides several options for sorting and filtering the environment by assets related to the selected asset.
For more information, see The Asset Interface
As mentioned in the section covering movement, double-clicking on an asset will not only select it, but will also lock the camera to the asset and zoom in to its location.