First-person view can be found and accessed in the dropdown menu once you have pressed with your left click of your mouse/touchpad on the View mode icon/button.
Make sure to press the spacebar first with the left click of your mouse/touchpad to enable access to the functionalities. You will find the first-person view as the first icon/button in the dropdown. Left-click on it with your mouse/touchpad to will instantly activate the first-person view.
Once in a first-person view, you can use your arrow keys as described for the movement in revvis or W, A, S, D keys combined with a mouse/touchpad movement to view and navigate around your property and look at it from any angle.
Check the controls here one more time for the best quality and experience in revvis .
You can access the visibilities menu  where you can toggle on/off offered functions you want to show/hide in the first-person view. Have in mind that not all functions will be available in each viewing mode. Follow the link check which visibility functions will be enabled 
You can access the room list  to view different floors and rooms of the property and use other functions as described in the room list functionality. Check the difference in the following link when in the first-person view. 
You can change the time of the day  and see how your property looks in the dawn, sunset or night time or the shadow play on your property.
You can use the measurement tool as described in the following link .
You can take screenshots as described in options menu in this link .
You can interact with doors and windows with the interaction key/button - left mouse click of your mouse/touchpad.
You can interact with the furniture as you are in every other viewing mode except the VR viewing mode as described in this link 
You can interact with the materials as you are in every other viewing mode except the VR viewing mode as described in this link 
You can save or save as our property configuration as described in options menu this link .
You can give us feedback as described in options menu in this link .
You can go back to main menu as described in options menu in this link .
You can quit revvis as described in options menu in this link .
You can access client's website as described in white labelling section in this link .