Disable game hud - del. Left ctrl to stop the time. Then insert to make camera ON. Then numpad to use the camera for "walk" around.

Controls

Key/button 	Description

Ctrl-Ins 	Show / Hide Camera tools main window
Ctrl + Mouse wheel 	Resize font
Ins 	Enable/Disable camera
HOME 	Lock/unlock camera movement
DEL 	Toggle HUD
ALT + rotate/move 	Faster rotate / move
Right-CTRL + rotate/move 	Slower rotate / move
Controller Y-button + l/r-stick 	Faster rotate / move
Controller X-button + l/r-stick 	Slower rotate / move
Arrow up/down or mouse or r-stick 	Rotate camera up/down
Arrow left/right or mouse or r-stick 	Rotate camera left/right
Numpad 8/Numpad 5 or l-stick 	Move camera forward/backward
Numpad 4/Numpad 6 or l-stick 	Move camera left / right
Numpad 7/Numpad 9 or l/r-trigger 	Move camera up / down
Numpad 1/Numpad 3 or d-pad left/right 	Tilt camera left / right
Numpad +/- or d-pad up/down 	Increase / decrease FoV
Numpad * or controller B-button 	Reset FoV
Numpad . 	Block input to game for camera control device.
Numpad 0 	Toggle game pause