If you don't want to install yet or don't have a currently compatible system you can preview here.
Quickstart
Short right mouse button click switches mode from mouse moving cursor around the screen to looking around - like in a first person video game.
Another short right button click when you want the cursor visible again.
Long right button click to zoom content.
Escape key or middle mouse button to revert a zoom.
Cursor keys, mouse wheel to move around, or xbox controller if you have one.
CTRL-left Windows key : Toggle toolbar on/off
CAPS-LOCK toggle run mode (for getting around large areas fast)