Parenting is one of the most important concepts to understand when using Unity. The three small coloured squares around the center of the Translate gizmo activate the lock for each plane the colors correspond to the axis that will be locked when the square is clicked (eg, blue locks the Z axis). There is also an additional option in Translate mode to lock movement to a particular plane (ie, allow dragging in two of the axes while keeping the third unchanged). A Transform showing the selected (yellow) X axis If you subsequently drag with the middle mouse button, the axis last selected will be used regardless of the mouse position. When you release the mouse button, the axis remains selected.

As you drag the mouse, you will see the object translate, rotate, or scale along the selected axis. When you click and drag on one of the three gizmo axes, you will notice that its color changes to yellow. The appearance of the gizmo depends on which tool is selected. When you click on an object, you will see the tool gizmo appear within it. The tools can be used on any object in the scene. The View, Translate, Rotate, and Scale tools These tools are located in the upper left-hand corner of the Unity Editor. In the scene, you can modify Transforms using the Move, Rotate and Scale tools. A transform showing the color-coding of the axesĪ Transform can be edited in the Scene View or by changing its properties in the Inspector. In Unity, these axes are represented by the colors red, green, and blue respectively. Transforms are manipulated in 3D space in the X, Y, and Z axes or in 2D space in just X and Y. A GameObject will always have a Transform component attached - it is not possible to remove a Transform or to create a GameObject without one. The Transform is used to store a GameObject’s position, rotation, scale and parenting state and is thus very important.

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