Viewport Input Settings
This window contains various settings for customizing Viewport controls.
To open it, select Viewport Input Settings from the Settings menu:
Select
The mouse button used for selecting objects in the Viewport.
Select Frame
The button for the border select feature.
Multiselect modifier
The modifier key for selecting multiple objects.
Select reverse hierarchy modifier
The key used for selecting reverse hierarchy (i.e. selecting every parent of the object).
Camera orientation tool show sides cube
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Hide manipulators
The key for hiding Manipulators in the Viewport.
Manipulator move
The key for interacting with Manipulators.
Manipulator pull from anywhere
Keys for operating the selected part of the Manipulator (even when the mouse does not point at it).
Manipulator radius
Keys and mouse buttons for scaling the Manipulators.
Move pivot
The mouse button used for setting the pivot point.
Scene camera dolly
The keys for moving a (currently used) user-created camera back and forth.
Scene camera rotation
The keys for rotating a user-created camera.
Scene camera translation
The keys for translating a user-created camera.
Scene camera zooming
The keys for changing the zoom of a user-created camera.
Select rotation
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Select tracks
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Trajectory add fixed object
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Viewort camera gestures
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Viewport camera rotation
The keys used for rotating the viewport camera (the one that schows the scene by default).
Viewport camera translation
The keys used for translating the viewport camera.
Viewport camera zooming
The keys used for zooming the viewport camera in and out.
Reset to defaults
Restores every parameter to their default value.
Blender preset
Sets the Viewport controls to a scheme similar to the one in Blender.
Input Settings on macOS
If you are using macOS, be sure to set the Visor translation setting to Right Mouse + Shift + Alt.
Otherwise, you won't be able to control camera in the scene (this applies to Viewport camera and Camera Objects alike).