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It is really important to structure your sketches, Infusion 360, using certain parametric features.

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We will look at two of these features in this video.

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Dimensions and constraints.

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Dimensions can be added to sketch objects in Fusion 360 while sketching or of sketching.

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Here's how.

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I will first show you how to enter the dimensions of your design while creating your sketch.

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So let's create a two point rectangle first.

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So there you go.

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Now, as you can see, we have two pop ups here.

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The Dimension four, the width of the rectangle is currently selected.

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It's a 50mm.

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I can change it here.

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Let's say I want it to be 100mm.

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And now to toggle to the other dimension, which is my length, I can hit tab and it automatically switches

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to the other box.

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I can now type in, let's say, 200 and hit enter.

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So as you can see, our rectangle has been created and we have these two dimension pop ups here now.

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Dimensions can also be added after you're done with your design.

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So let's just create a rectangle without even thinking about the dimensions here.

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Now I can go up here and click on Sketch Dimension.

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So once I click on this, I am able to select any one line feels like this line.

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And as you can see, we have another dimension pop up here, and let's say I want to change that to

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150.

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I can do that.

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So that's how you can add dimension to the lines.

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You can also add dimensions of angles, so let's say they create.

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Two random lines here.

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Now, what gets Dimension allows me to do is set the angle between these lines so I can select that

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line first, followed by this line.

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And as you can see, we have an angle dimension here.

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I want the angle to be 45 degrees and fusion does that for us.

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The third type of sketch dimension that is very useful is distance between lines.

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So let's say I have two random lines here and I want the distance between them to be say Mm.

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I can click on Sketch Dimension, select this line first, followed by this line.

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And then click, as you can see, we have another dimension pop up here and I can Typekit follow.

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And as you can see, these lines are now spaced and dimension of 40mm.

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So that's it for this section.

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Let's move, go to the next one that we talk about constraints.

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Constraints, as the name suggests, are parameters to structure designs.

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There are four main constraints we will look at, which are tangent, lock, parallel and perpendicular.

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Let's take a look at these four important constraints individually.

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You will first take a look at the constraint.

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You can click it up here or go to the Constraints dropdown and select the tier.

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Now I want to make this line your tangent to the circle, so I will select my circle first, followed

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by the line.

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And as you can see, our line is.

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Automatically dragged down and made tangent to the circle.

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The object you don't want to move, for example, I didn't want to move my circles in this case needs

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to be selected first.

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Our second constraint is the fixed constraint, so I can draw a random line here.

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Now, see, I don't want to be able to move this line at all.

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I can click on Fix Select Line and select both these points.

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So now, as you can see, I just cannot move this line around.

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Now, in order to unfixed this, click again and click on all three, and now you can see my line is

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really.

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Our third type of constraint is parallel lines.

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I have two lines here, and I want to make the top one parallel to the bottom one.

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So I will go to parallel.

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Select the bottom one first, followed by the top one.

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And as you can see, our two lines have been made parallel.

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I can still move around this line, but as you can see, the gradient of the line will not change and

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hence it'll remain parallel to the bottom line.

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Our fourth type of constraint is perpendicular, so say I have two lines here.

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I want to make this one particular look this one.

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So I will click on this constraint up here.

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Select this and then select the.

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So as you can see, it is currently at a 90 degree angle from this one.

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I can move it around.

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But again, the gradient won't change and we have a perpendicular line.

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So these are the four important constraints you need to know.

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You can explore the others if you need them in your designs.

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But as you start off with Fusion 360, these are the four ones that will be really important to you.

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To end this video, I would like to say that I did not use constraints when I started off designing,

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but I realized that it becomes much more important when you become more advanced.

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Hence it's a really important concept to learn.

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I will see you in the next video where we talk about construction canvasses and planes.