Compass
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Tap to face north.
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Press and then drag to rotate the view around the center point.
Move In / Move Out
Moves you forward and backward from the fixed center point of the current view.
Walking View
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Moves from your current position to a horizontal, forward-facing view.
2D View
Toggles the view between a top-down (2D) position (relative to the current center point) back to the previous 3D view. The blue fill indicates when you are looking in a top-down view direction.
Fit
Allows you to zoom in to one or more selected objects in the current view. Fit places the center point as either the center of your model, or, if you select one or more objects, the center of the objects.