Selecting GameObjecs
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. Selected GameObjects are highlighted in the Scene view. By default, this highlight is an orange outline around the GameObject.
Scene Gizmo
- The Scene Gizmo is in the upper-right corner of the Scene View. This displays the Scene View Camera’s current orientation, and allows to quickly modify the viewing angle and projection mode.
- Click on any of the conical axis arms to snap the Scene View Camera to the axis it represents (for example: top view, left view and front view). You can also right-click the cube to bring up a menu with a list of viewing angles. To return to the default viewing angle, right-click the Scene Gizmo and click Free.
- To toggle Perspective on and off i.e. changes the projection mode of the Scene View between Perspective and Orthographic, click the cube in the centre of the Scene Gizmo, or the text below it.
- Click on the padlock on the top right of the Scene Gizmo to enable or disable rotation of the Scene.
Move, Rotate, Scale, and RectTransform
- HandTool : It is for panning around the Scene. Panning means swivelling a still or video camera horizontally from a fixed position. This motion is similar to the motion of a person when they turn their head on their neck from left to right.
- MoveTool : 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.
- Rotate tool : 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).
- Scale tool : 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.
- RectTransform Tool: 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:
- Click and drag within the rectangular Gizmo to move the GameObject.
- Click and drag any corner or edge of the rectangular Gizmo to scale the GameObject.
- Drag an edge to scale the GameObject along one axis.
- Drag a corner to scale the GameObject on two axes.
- To rotate the GameObject, position your cursor just beyond a corner of the rectangle. The cursor changes to display a rotation icon. Click and drag from this area to rotate the GameObject.
- Gizmo handle position toggles
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.
For position
Click the Pivot/Center button on the left to toggle between Pivot and Center.- Pivot positions the Gizmo at the actual pivot point of a Mesh.
- Center positions the Gizmo at the center of the GameObject’s rendered bounds.
For rotation
Click the Local/Global button on the right to toggle between Local and Global.- Local keeps the Gizmo’s rotation relative to the GameObject’s.
- Global clamps the Gizmo to world space orientation.
Reference