Mouse Operation in View Port
The right mouse button is used to select and un-select vertices, and check vertex information.
Select Vertices
Click on a not-selected vertex, the clicked vertex is selected and indicated by a red ball.
Un-Select Vertices
Click on a selected vertex, the clicked vertex is un-selected.
Check Vertex Information
When a vertex is clicked, its position, rotation, mesh index are also displayed in the bottom status bar for a few seconds as shown in the following figure:
