In this lesson video, we are going to discuss how to set an object's dimension in blender, and then how to apply the transformation. When modeling an object, we often need to set the object's size to a certain value. In blender, we can do this easily using the dimension input fields, which is located in the viewport sidebar panel, so you can press n to show it if it is currently hidden. Notice below the transformation values, we can see the dimensions section. Currently, the cube object has two meters with two meters depth and two meters height indicated by these X, Y and Z values. To change the size we can type the new size directly in these input fields.

For example, we want to set the width of the cube to be five meters. To do that, just change the x value here to five then hit enter the cubes domain Now has changed, we now have a cube, or rather a box that has five meters with using this method, we can easily set any object to have any dimension we want. But there is something that you need to be aware of. When you change the dimension. brander actually scales the object so it fits to the target size value that we input. notice up here, the scale x value of the object is not at its default anymore, it is now 2.5.

Well, the scale values at y and z are still at the defaults, which is one. When doing precision modeling, or creating a rig for any nation, you always want your objects scale to be at the default values. This requirement applies to every 3d software that I know of, not just blender. Why? Well, it's kind of a long story. But basically, you will get troubles later when doing certain operations in render.

If you're out The scale is not at the default or even stretch non uniformly. To avoid these problems, you need to apply the scale value of the object. Now, applying transformation is different than resetting transformation in terms of scaling, resetting the transformation will change the scale values back to one, but this will affect the dimension of the object also. So this object for example, will be two meter with again, on the other hand, applying transformation, we will change the scale values back to the defaults, but it will retain the objects dimension. So, for example, we can apply the scale transformation of this object by pressing Ctrl A. Notice we have the option here for the type of transformation that we want to apply to scale here.

Now, notice the scale values up here has been reverted back to the default which is one but the dimension that we Before is maintained, if you forget the shortcut, you can go to the Object menu up here and then choose apply then choose scale here. Now although you can apply any transformation such as position and rotation also, but most often what you will need is applying the scale, especially after changing the dimension. So a tip for me here is after changing the objects dimension, always apply the scale I repeat, after changing the dimension value, always apply the scale okay? If you follow this tip consistently, you will avoid many problems later down the road.