To select a GameObject, click on it in the Scene view or click its name in the Hierarchy window. To select or de-select multiple GameObjects, hold the Shift key while clicking, or drag a rectangle around multiple GameObjects to select them.
Unity highlights selected GameObjects and their children in the Scene view. By default, the selection outline color is orange, and the child outline color is blue. You can also choose to highlight selected GameObjects’ wireframes in a different color. You can change all of these outline highlight colors from the Unity Preferences (Unity > Preferences on macOS or Edit > Preferences on Windows).
See documentation on the Gizmos Menu for more information about the outline and wireframe selection visualizations.
Selected GameObjects also display a Gizmo in the Scene view if you have one of the four Transform tools selected:
The first tool in the toolbar, the Hand Tool, is for panning around the Scene. The Move, Rotate, Scale, Rect Transform and Transform tools allow you to edit individual GameObjects. To alter the Transform component of the GameObject, use the mouse to manipulate any Gizmo axis, or type values directly into the number fields of the Transform component in the Inspector.
Alternatively, you can select each of the four Transform modes with a hotkey: W for Move, E for Rotate, R for Scale, T for RectTransform, and Y for Transform.
At the center of the Move Gizmo, there are three small squares you can use to drag the GameObject within a single plane (meaning you can move two axes at once while the third keeps still).
If you hold shift while clicking and dragging in the center of the Move Gizmo, the center of the Gizmo changes to a flat square. The flat square indicates that you can move the GameObject around on a plane relative to the direction the Scene view Camera is facing.
With the Rotate tool selected, change the GameObject’s rotation by clicking and dragging the axes of the wireframe sphere Gizmo that appears around it. As with the Move Gizmo, the last axis you changed will be colored yellow. Think of the red, green and blue circles as performing rotation around the red, green and blue axes that appear in the Move mode (red is the x-axis, green in the y-axis, and blue is the z-axis). Finally, use the outermost circle to rotate the GameObject around the Scene view z-axis. Think of this as rotating in screen space.
The Scale tool lets you rescale the GameObject evenly on all axes at once by clicking and dragging on the cube at the center of the Gizmo. You can also scale the axes individually, but you should take care if you do this when there are child GameObjects, because the effect can look quite strange.
The RectTransform is commonly used for positioning 2D elements such as Sprites or UI elements, but it can also be useful for manipulating 3D GameObjects. It combines moving, scaling and rotation into a single Gizmo:
Note that in 2D mode, you can’t change the z-axis in the Scene using the Gizmos. However, it is useful for certain scripting techniques to use the z-axis for other purposes, so you can still set the z-axis using the Transform component in the Inspector.
For more information on transforming GameObjects, see documentation on the Transform Component.
The Transform tool combines the Move, Rotate and Scale tools. Its Gizmo provides handles for movement and rotation. When the Tool Handle Rotation is set to Local (see below), the Transform tool also provides handles for scaling the selected GameObject.
The Gizmo handle position toggles are used to define the location of any Transform tool Gizmo, and the handles use to manipulate the Gizmo itself.
Click the Pivot/Center button on the left to toggle between Pivot and Center.
Click the Local/Global button on the right to toggle between Local and Global.
While dragging any Gizmo Axis using the Move tool or the Transform tool, hold the Control key (Command on Mac) to snap to increments defined in the Snap Settings (menu: Edit > Snap Settings…)
While dragging in the center using the Move tool, hold Shift and Control (Command on Mac) to quickly snap the GameObject to the intersection of any Collider.
While using the Rotate tool, hold Shift and Control (Command on Mac) to rotate the GameObject towards a point on the surface of any Collider.
Use vertex snapping to quickly assemble your Scenes: take any vertex from a given Mesh and place that vertex in the same position as any vertex from any other Mesh you choose. For example, use vertex snapping to align road sections precisely in a racing game, or to position power-up items at the vertices of a Mesh.
Follow the steps below to use vertex snapping:
Select the Mesh you want to manipulate and make sure the Move tool or the Transform tool is active.
Press and hold the V key to activate the vertex snapping mode.
Move your cursor over the vertex on your Mesh that you want to use as the pivot point.
Hold down the left mouse button once your cursor is over the vertex you want and drag your Mesh next to any other vertex on another Mesh.
Release the mouse button and the V key when you are happy with the results (Shift+V acts as a toggle of this functionality).
Note: You can snap vertex to vertex, vertex to surface, and pivot to vertex.
While using the Transform tool, hold down the Shift key to enable Screen Space mode. This mode allows you to move, rotate and scale GameObjects as they appear on the screen, rather than in the Scene.