Let us understand user parameters in the Modify. In the change parameters option, I have used the parameters, user parameters are the ones that we give, even before starting the model, or we can give it even in between. So here I am giving the length parameter, the bread parameter. And the expression Yeah, you can see, I can give the relationship between these parameters. Then I'm going to have the height parameter. This again, I can give a formula with the existing parameter.

So, now I'm going to I'm going to create an extrusion, I can apply these parameters. So here, I'm going D for dimension and instead of default, I can type it as length. So the length parameter is applied. So whatever the value is there in that cell, that will be applied over here. So here I'm giving it as bread. And you can see, because I have given the relationship, the same values apply over here.

And here I'm giving the height. I'm going to again type for height parameter. And you can see that my extrusion is ready. Now let us measure this. Now this length is 100 mm. I'm going to change this user parameter I'm going to modify change parameters.

This length I'm modifying it to 1500. Now it has scaled up. Let us go to inspect and measured. So here you can see the lentes 1500. I can again see this Lantus 750. And this asked three So you can see how easily we can change these parameters.

We know that gears come in different sizes, but the relationship between the angles and the formula to create the teeth and the diameter will always remain the same. So user parameters play an important role in designing different sizes of gifts. So if we are going to create one gear with the right dimensions and right relationships, then the other guests have different sizes can easily be created using this user parameters with very little modifications and in a short time