When reviewing 3D objects in a CAD drawing, you might need to rotate the 3D objects around Axis-X, Axis-Y, or Axis-Z, and switch between standard and isometric views.
Three hot keys and three buttons are provided in Easy CAD Viewer for the three kinds of rotations.
Eye Rotate (Rotate around Axis-Z)
The eye rotate is a term for rotation around Axis-Z.
The vertical rotate is a term for rotation around Axis-Y.
The horizontal rotate is a term for rotation around Axis-X.
When you view 2D objects based CAD drawings, the three hot keys and buttons are grayed out. They are only accessible when a 3D drawing is loaded.