There are several hotkeys available when interacting with VRED:
Alt + Left Mouse Button Fix Face NormalAlt + Middle Mouse Button Fix Surface Face NormalAlt + Right Mouse Button Fix Connected Face NormalCtrl + Left Mouse Button Navigation PanCtrl + Right Mouse Button Navigation CenterCtrl + Alt + RMB Navigation OrbitCtrl + Alt + LMB Navigation OrbitCtrl + Shift + Left Mouse Button Select Object (Add)Ctrl + Shift + Right Mouse Button Deselect Object (Sub)Down Move Camera BackwardLeft Revolve Camera Left around PivotAlt + V Show View CubeAlt + N Show Navigation BarLeft Mouse Button Navigation RotateLeft Mouse Button + M Material CopyLeft Mouse Button Double Click Camera Set PivotMiddle Mouse Button Double Click Camera Zoom to Hit Point, Set Pivot, and Look AtRight Revolve Camera Right around PivotRight Mouse Button Navigation ZoomRight Mouse Button + M Material ApplyRight Mouse Button Double Click Camera Set Pivot and Look AtShift + Left Mouse Button Select ObjectShift + Right Mouse Button Deselect ObjectUp Move Camera Forward