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So now we're going to look at some layers and layers is something it's it's a fundamental in AutoCAD,

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really.

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And some people, well, you should use them.

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It makes your life easier.

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It would also, if you were in the workplace, they would expect you to use them.

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And some people don't, especially self-taught people can maybe not use them because they're not used

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to them.

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AutoCAD, like a lot of CAD software, it's one of those things you could you could start using it,

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you could find your way through it.

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You could learn to draw rectangles and things.

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And it's it's quite self-explanatory.

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And maybe someone who's self-taught could end up being able to draw the object they wanted to draw.

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And I think, well, I know how to use AutoCAD.

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But there's all sorts of things in there, such as come CAD standards and just professional ways of

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using the software.

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But if you're not sure and you wouldn't even know you were supposed to do and that's one of the one

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of the ways in the workplace you can tell someone who's.

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Kind of just picked up the software and learned to use it against someone who's been properly trained.

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Is the way that you do certain things and layers is definitely one of those things.

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So it's important to know about layers and also how they can make your life so much easier, especially

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when you start getting a more complex drawing.

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So we'll look at the basic principles in this chapter and in other chapters in the actual courses you'll

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put them into practice.

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But we'll go over now looking at just the principles behind the layer system.

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And to do that we're going to use an example drawing in the resources which is building zero one.

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Okay?

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And if you open that.

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Now, if you open it up and it looks like this, okay, you're in the layout tab.

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If you don't understand what that is, don't worry.

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You just haven't got that far in your course yet.

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But you want to click.

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If it does look like this with a white background, you want to click down here where it says model.

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Okay.

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And you'll be covering all that later in whatever course you're doing, if you haven't already.

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But for now, just click on model so you'll get a black black background and it will look similar to

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my screen.

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And let's look at what layers are all about.

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So.

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Let's imagine we've we've got this building layout here and we've got our external walls.

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We've got our windows.

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So this is a building layout.

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It's fairly simple, but a large building will just be the same on a larger scale.

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So it's a good example.

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And we're looking down on the building plan if you're not used to looking at building plans.

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We're looking down on kind of a cut through of a building.

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Okay.

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So these gray, thick walls here, these are the external walls of the building and the green objects

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are the windows.

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So it's kind of cut, cut through if you imagine cutting a line halfway up the wall of a building and

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it goes through the windows and the doors.

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This is what we're looking at here.

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These thinner lines are the internal walls.

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So they would be like a partition wall.

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The blue objects are doors.

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So these are showing a door and it's showing how it swings.

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If you just showed a door here as a line in the wall, it wouldn't tell you how that door opens.

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So you need to know which way it would actually swing, which would tell the person building the layout

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how to hang the door.

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It's hanging here and it's swinging this way.

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Okay.

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So it's important to know that again, here you've got a double door.

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And that's kind of a standard standard.

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You might have more detail of a frame on some blocks, but for a simple layout like this, that's a

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standard block or standard way of creating a door.

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So these orange objects, these are strip lights on the ceiling.

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So this would probably be a lighting layout, for instance, for the electrical contractor.

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And that's basically that's again, a simple layout, but it's going to it's all created properly using

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the correct layers.

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So what are layers?

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Well, a layer is a way of separating objects into.

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Similar groups, if you like.

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So the layers can be found.

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We have a layer tab here which will give you commands to work with layers, but if you want to actually

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see the layers they found under the properties box.

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Yeah.

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And if we click on Layer properties, which is this button, it will come up with this.

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Properties manager here, which allows you to manage all the layers in a drawing.

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And now we'll look at this and it will give you an idea of what layers actually do.

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So if we look at our list here and I'm just going to move it so you can see the drawing as well, just

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move it there.

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We have layer zero.

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Layer zero is standard when you create a drawing.

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If I was to go and create a new drawing just by clicking that tab.

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We get a new drawing and our layer manager now in this drawing, it says layer zero.

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Okay, So when you start a new drawing, it has one layer, which is layer zero.

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And if you want to create any more, you need to add them.

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And we'll look at that in a minute.

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But back to this one.

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We have other layers here.

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Apart from layer zero, we've got def points.

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Def points is kind of an automatically generated layer.

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Just ignore that for now, don't worry about it.

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But these layers are layers that have been created in this drawing and we've got layers for each item

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or each type of item.

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So we've got doors which is obviously the doors.

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We've got the external walls, which is these thick walls.

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We've got internal walls, we've got lighting.

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Okay, Title block.

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Don't worry about that.

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Windows.

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Windows is these green objects.

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Okay.

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And then we've got one called Hatch.

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Hatch is basically the hatch inside the walls.

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Sometimes you might want to show that.

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Sometimes you might not.

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So why do we separate them out?

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Well.

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Perhaps is a good example.

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Let's say for this drawing, the electrical contractor says, actually, I don't want to show the hatched

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in this building.

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Okay.

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Maybe the architect does.

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The electrical contractor doesn't for whatever reason.

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Because this is on hatch layer.

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All what we can do.

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We can select this light bulb here.

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Okay?

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This light bulb is a visibility icon.

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It's kind of standard around Autodesk range of software.

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If a light bulb is on, it's visible.

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If a light bulb is off, which you can do by clicking it, it's not visible and you'll see our hatch

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is all disappeared now, but it's not deleted.

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All we've done is turn all the hatches off.

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Okay?

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By clicking that.

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And maybe this drawing goes somewhere else, not the electrical contractor.

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And I don't want the light showing.

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We can go to lighting and we can switch that off.

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Okay.

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And we could switch doors off.

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We could switch the internal walls off.

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We could take the windows out.

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Okay, so now we've just got our walls with the openings for windows, but not the actual windows.

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That's our external wall.

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And if we wanted to bring any back in, we can just turn them on and off again.

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So.

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That is really the principle of layers.

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It enables you to turn items off and make them not visible and.

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Do other change properties which will only affect that group.

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So let's say the internal walls.

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So we turn the hatch off.

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Okay, The internal walls.

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I want all those to be dashed lines so you can select the line and you could go dashed.

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Okay.

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I change the scale.

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So that's the dash line.

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And you could select all the lines for the internal walls and you could do the same.

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But what you'll notice is that most objects by default when they're created, the line type style is

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by layer.

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Okay.

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And that goes for if I click it the color.

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Well, that can be set to by layer.

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Okay.

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The line thickness can be set to by layer.

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So what does by layer mean?

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Well, it means those properties, whether it be color, line type, whatever, have been set in the

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layer manager.