To Toggle Gravity
To toggle gravity
When using the
Walk
tool, click
Viewpoint
tab
Navigate
panel
Realism
drop-down
Gravity
check box.
Command entry:
CTRL + G
Parent topic:
Gravity
Navigate panel Realism drop-down 
Gravity check box. 
Command entry: CTRL + G Navigate panel Realism drop-down Gravity check box. Command entry: CTRL + G