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Okay, so now we're going to look at model space and paper space.

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This is one of those things in AutoCAD that a lot of people can struggle with.

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I still work with companies and people now who don't use it properly, who seem to have given up even

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trying because they do it in bizarre ways to get around it.

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It's a very simple concept, and like most of these things, once you grasp it, you'll never forget

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it.

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And once you start using it properly, you realize why we need to do that.

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A lot of people don't see the point in having a different space in model space and paper space, but

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that's because they're the kind of.

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The way they get around it makes the drawing worse and makes a people's life more difficult.

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You'll see why, and I'm going to explain it, hopefully in an easy way to grasp.

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Okay.

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But first, what we're going to do, we're going to open in the resource file, the Building zero one

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drawing, which is our building layout.

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I'll close the properties for now.

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So in AutoCAD, as you've seen, we always draw actual size, whether it's something a small mechanical

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piece.

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Or which is actually going to show us 1 to 1 actual size on the paper, or it's a layout of a large

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building or even a something like a retail park, which is huge.

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Maybe it could be something.

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It could be a city, it could be miles and miles wide.

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It doesn't matter.

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We draw that actual size in terms of units.

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Okay, Now your units might be set to miles or meters or millimeters, but it's still going to be drawn

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actual size.

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So this building, for instance.

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I'm going to go.

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We have a tool up here.

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If we haven't looked at it already, depending on what course you're doing, we've got this measure

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tool.

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Okay.

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Um, I would say this is another one of those things where AutoCAD tried to improve.

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It's not necessarily improved it a bit.

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It has got a tool for measuring and if you click this arrow, you can measure the distance, the radius,

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the angle, the area of volume, but then it's got a standard button, just measure and that will AutoCAD

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will try and guess what you're measuring.

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The problem is it can be a bit resource hungry and if you've got a busy drawing, sometimes it doesn't

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help.

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So I tend to use the distance.

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If you pull this down, you've got a distance measuring tool and it's just a ruler.

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Okay, so now you can click on two points and you can measure distance and our distance is 20,000mm.

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Okay?

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So 20m.

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In other words, this building is 20m wide.

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Now, if you were to print that actual size, you would need a very big printer to print something 20m

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wide.

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So you would put that on a sheet of paper, whether it's an A4 sheet, A3, whatever size paper you're

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going to print on, you would have to show it to scale and we'll look at scales.

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But the concept is you would show it smaller than actual size.

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However, it's drawn to actual size.

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You don't want to start drawing things to the size that you're going to print it.

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If you was going to print this out on a piece of paper so that it was only ten centimeters wide on a

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sheet of paper, you don't want to be having to do that calculation.

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Oh, okay, I'm going to draw this.

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It's actually going to be ten centimeters wide.

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Therefore, this room isn't.

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It needs to be.

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And you've got you know, if you see what I mean, you'd have a a calculation to do every time you created

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a new object.

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How that would scale down.

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You don't need to do that in AutoCAD.

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You shouldn't do that in AutoCAD.

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It defeats the whole object of using AutoCAD.

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You may as well be using something like paint or PowerPoint.

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Okay, AutoCAD is a precision drafting tool and you draw everything at actual size.

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So we draw this at 20m wide the way it wants to be.

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And then what we do, we have everything here drawn to actual size, and this is known as our model

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space.

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So this is our model, our model of our building created to actual size in model space.

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We've got a black background here and we've got if you look at these tabs, this one says model.

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So we are in the model space where everything is created actual size as per the real world.

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We also have these layout tabs.

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Now ignore the fact there's two of them.

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Okay, we're only going to work with one.

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If you click this layout tab here, you'll see the screen.

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The background has gone white and this is known as paper space.

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When you're in these layout tabs, this is paper space.

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What we're seeing now is how it will print out.

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It's kind of like a print preview, but you can work in this space.

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So if I do the measure again and I measure this distance.

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This black line here and these blocks with the text.

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This is called a title block.

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So this is what you will print out which will tell you what your drawing is going to tell us.

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It's the building plan, the date, the initials, maybe a drawing number, blah, blah, blah.

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So if I measure the distance here, it's 261mm.

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So that's that's probably that's going to fit on a piece of paper from my printer.

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26cm.

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Okay.

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So again, this sheet is designed.

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To fit an A4 piece of paper at 26cm and it measures 26cm.

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So ignore the building, pretend that wasn't there.

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Okay.

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If I was to copy this, just move it out there.

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This is a drawing sheet for an A4 piece of paper and it's drawn actual size.

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Again, everything in AutoCAD is drawn actual size.

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So our paper frame is actual size in paper space.

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Our model is actual size.

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In model space, this is 20,000mm.

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This is 260mm.

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Okay, so we're both drawing actual size in the relative space.

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So how then do we show our model in this piece of paper?

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For this, we use something called viewpoint.

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And this is where people get people get a bit confused about what's happening.

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I want you to imagine you're looking out of your window.

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So if you sat near a window, look out that window now.

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And I'm presuming somewhere outside of that window you can see a building and that building is probably

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many meters tall.

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Okay.

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But your window frame might only be one meter tall.

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Yet you can see maybe you can see the whole outline of that building.

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So you might be able to see a 20 meter high building and see the whole outline of that for a window

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frame.

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But it's only one meter tall.

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How does that work?

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Well, the building's far away.

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So you're you've zoomed out, if you like.

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The building is set way back.

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So through your one meter square window, you can see a 20 meter building.

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If you remember that, that's all you need to know.

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That is how a view port works.

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Okay, so what I'm going to do in this frame, I'm going to insert a view port.

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And a view port is a window.

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It's a window from paper space to model space.

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Okay.

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And where we add that window, because we're in the layout tab, we will have this available to us here.

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Layout.

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Okay.

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And under that we have layout viewports.

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There are different ones.

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Just go for rectangular.

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Now just click on where it says rectangular.

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Okay.

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And what it's going to do now, it's just like drawing a rectangle, one corner.

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Another corner and you should now see your building layout.

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Okay.

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This rectangle with triangle we've just drawn.

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We can move that.

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We can do things with it.

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Maybe we'll put it over here.

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We can use grips.

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We can change the size of it.

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But this is a window.

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This is a window looking through from paper space to model space.

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And if we double click it, we can go into the window.

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So now we look.

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Now we're kind of controlling the view in this window if you use your normal view tool, so your middle

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wheel, you can zoom in and out, you can pan.

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Okay, You'll see that changes in size.

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Now we're not.

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Now it's important to remember we're not changing the size of this model.

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We're not affecting this model in any way.

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All we're doing is adjusting the view.

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So the example we used of looking through your window and seeing a building, if that building was right

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up to you, you'd probably see that, okay, if that building was a mile away, it might look like that.

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And that's all we're doing here.

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So we're setting it to how we want to see if if we just wanted to make sure we saw the whole thing.

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We can use a double click zoom extents.

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Okay.

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And we've got the building in our window.

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So now we can see the whole building.

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And if we double click out of here, what we could do, we could kind of use a move command with a base

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point.

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We can move that in here now and we've got that building layout.

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So we have.

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A paper space drawing frame which is drawn to actual size.

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We have.

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A building which is still actual size.

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We haven't altered it at all and we have a window from one to the other where we've set the view so

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that we can see it.

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Okay.

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And.

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Well, what's important to remember, if you were to print this out and you were to try and use it,

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nobody would kind of know what scale this is.

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We tend to use scales, so different drawings.

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If we just zoomed extents in this window and you add all sorts of different drawings, but none of them

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would look the same.

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They'd all be to different sizes.

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So you tend to use standard scales.

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I don't want to get too much into engineering, but scales would be something like 1 to 100.

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So 1 to 100, for instance, would mean that 100m in model space would equal one meter in paper space.

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That's how a scale works.

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So when you say 1 to 100, it just it's a ratio and we can do that easily in CAD, so we can double

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click in our window.

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And instead of using the Zoom command, if we look down here, we have the standard scales is kind of

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set up.

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So if we wanted to show his actual size, that would be 1 to 1.

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And if I just pan it a bit so we can actually do it on something.

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So if I set this at 1 to 1 that is actual size.

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So we only get a bit of that wall.

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I think it's 100 millimeter wall.

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That's how it's going to look at actual size on, on a piece of A4 paper.

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But we can change that.

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Maybe we want, let's say 1 to 10, that's still way too big.

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Okay.

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So it's going to be something more like 1 to 100.

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1 to 100 I'd say is perfect.

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So that is to an official actual scale of 1 to 100.

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Okay.

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And we can use that.