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Okay, so I'm back to a blank screen now and I'm going to select the polyline.

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And you might have noticed and we did mention it in the last chapter as we're drawing, you can see

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when we move our cursor, we sometimes get these kind of green highlighted objects on your cursor and

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you may not see them.

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You may see them.

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We're going to look at those and setting them up now.

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We're going to see what they are and how you set those up.

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Okay.

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But what they're doing, they allow you to snap your cursor onto a specific point or part of an object.

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So let me close that.

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Let's say I wanted to draw a just this kind of shape here and it was closed.

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Okay.

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So it was the end of the line, met the start of a line.

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Now if I didn't have those snap on, I would be doing it by eye and I'd be like, okay, that's about

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on there.

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But the more you zoom in, the further away you are.

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And if you don't get those points exactly aligned, it's not going to work out in terms of measuring

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angles and filling it with a color and that kind of thing.

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You need the end to be exactly on the start.

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Okay?

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And the way you do that is by using things called oh snaps.

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So if I just exit that your oh, snap settings are down here.

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There's kind of a rectangle with a small square in the corner.

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Okay.

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And next to that you've got a pull down arrow.

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If you click that, these are all the options you get.

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So this is basically where your line can snap to.

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I'm just going to turn all mine off.

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You can turn them on and off by clicking them and you'll see you get a tick next to the ones that are

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turned on.

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So if I just wanted the end points, I'm just going to select that, okay?

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And I'm going to click off here.

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Now, it's not it's not on yet.

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All I've done is select the points I want to snap to when the command is turned on and what will happen.

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You'll turn this command on and off as you go.

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So to turn it on and off, you can click that and you'll see it goes blue to be turned on.

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I'm going.

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It glows when it's turned off.

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But most people use the do use the shortcut key for this one just because it's used so often.

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And the key for this one is f three on your keyboard and you'll see if I press F three, it turns on

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and off.

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Okay, so I'm going to turn that on.

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And again, all we've got selected is End Point at the moment.

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So if I go to draw another line.

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When I hover over this line, you'll see it comes up with these green squares.

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Depending which end point I'm nearest to.

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So all I need to do is hover over an object and it will go to its end point.

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Okay.

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And if I was to now just hover about there when this green square comes up, if I left click to start

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a line, you'll see actually started.

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On my End Point.

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Exactly.

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On the end point.

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I don't need to zoom in, try and do it by eye.

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And if I want to finish it on the end of this line, all I need to do is go nearby till that.

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Square comes up and left click and it's exactly on that endpoint.

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Okay.

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There's no guessing.

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It's exactly on there.

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So that is basically what our snaps do and you can put on all these different options.

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So let's look at some of the others.

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We have midpoint.

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Okay.

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So as you've probably guessed, rather than snapping to the end, we'll also get one now at the middle

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and it's a triangle and it says midpoint.

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So sometimes you want to have a line exactly at the middle of something.

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Exactly.

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At the middle of another line.

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We want a line coming off exactly the middle of this line.

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We can just have that snap to endpoint and all we need do is get nearby and it will automatically do

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it.

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Okay.

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So some of the others center, if you're working with circles, maybe you have a couple of circles you

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want to draw a line from the center of that one to that one.

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Okay, so we'll select the line and we'll put on the circle.

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And now all we need to do is go near that circle and you get center.

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Okay?

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So again, if we just near that circle, as long as we get the green center symbol and click.

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It snapped us right to the center of that circle.

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Okay.

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No guesswork involved.

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We'll forget that one.

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No, we're not.

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We haven't done nodes.

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Nodes are basically points.

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We'll look at those later quadrants.

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So maybe we wanted the line to be at the top of this circle.

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Okay, so these are your quadrants, top right, bottom left.

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And it's exactly a kind of 12:00 position, 3:00, 6:00, 9:00.

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Okay.

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And you know that they are exactly those positions because you snap to them intersection.

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So maybe we add a line crossing there.

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We want to draw a line from the intersection of these two lines.

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Okay.

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So when we get nearby, you'll see it's hard to see this one.

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It's basically putting a green cross.

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And but it will come up with a word intersection as well.

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So you get nearby and it will snap.

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Now, you might notice it's becoming less and less easy to snap to it.

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And that's because we've got more things on.

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So when you get here, you might.

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It's easier to go to the midpoint intersection.

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Okay.

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You do end up sometimes in busy joins.

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It's hard to actually see what snap you've got.

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So in that case you might want to turn things on and off.

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So maybe let's turn midpoint off here and now we can snap easier to the intersection.

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And we know that that line starts where those two lines cross.

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Well.

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Well, I'm just going to go through the main ones.

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Use some of them you'll hardly ever use perpendicular, so we'll turn that on.

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Let's say we wanted to draw a line and it was from the end there, but it had to meet this line.

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Exactly a right angle that's perpendicular.

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So now when I go nearby, you'll see we get this perpendicular sign, which is a right angle if I let

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it snap there.

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I know this line has met that line at 90 degrees.

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Okay, tangent.

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So let's see if we're drawing, if we've got a circle and we want a line to come off here and we don't

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want it to go to the quadrant, we want it kind of to a tangent, we can have tangent selected.

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I'll turn off quadrant just to make it easier and now it will get this tangent command so it meets that

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circle at the correct tangent.

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Okay.

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Again, you don't use it a lot, but when you do, when you need it, you really do need it.

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So that's tangent and nearest.

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So maybe you want a line to come off this line.

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At no specific point.

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Not the midpoint.

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No specific point.

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But it did need to be on this line somewhere.

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It did need to meet the line.

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You can have nearest and as long as you're near that line, wherever you click will actually be on the

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line itself.

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Okay.

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It might not it won't be the midpoint, it won't be any specific part of that line, but it will be

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on that line and apparent intersection.

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That's more for when you've got things in 3D.

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So intersection was two lines crossing.

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So that would be the intersection.

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When you're working in 3D, it might be the lines are crossing in your current view, but they don't

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actually cross.

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The one might be higher.

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It's a bit advanced to get into at the moment, but that's basically what it is.

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So they're the main ones.

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What I tend to have is I have mine set up at endpoint midpoint intersection.

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Okay, nearest can be quite dangerous if you want.

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If you have nearest on then it's, it's hard to get to endpoints midpoints because you've got nearest

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turned on.

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So you're always going to have that option to just be to just be at the nearest point.

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Okay.

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So I tend to only have it on if I need it.

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Um, so endpoint midpoint, intersection and perpendicular usually have those on.

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Okay.

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And they're the settings kind of a default settings I'll have which allow you to just snap to end points,

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but you can turn those on and off all the time with the F3 key.

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So that's how I tend to work and most people tend to work.

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You'll have those on and it'll just be a case of turning the whole setting off and on with F3 while

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having the having it set up this way.

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Okay, that will do for, I'd say a good 80% of the time.

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Now, the other thing we need to look at here is something called ortho.

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If we're drawing a line we've already seen, we can give it an angle of zero.

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Okay?

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And it will just be in that plane and maybe the next line, we can give it an angle of 90 and it will

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just be in that plane.

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But a lot of the time you do want to work in kind of 90 degrees.

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So you do want to work.

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Exactly horizontal or exactly vertical.

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And you don't want to go to the hassle of putting in this angle all the time.

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We have the option.

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We have something called ortho, which is down here.

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And if we turn that on by clicking it and you'll see it highlights.

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Now, when we do a line, it will only let us go in these 90 degree planes, either vertical or horizontal.

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So that comes in really handy when you want to get exactly straight lines at 90 degrees, because with

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that on you, you can just draw a freehand like that or you can just put in lengths.

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And press return and not worry about it being exactly 90 degrees because you've got this offer turned

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on.

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Okay, so a bit like, Oh snap, this is a setting you will turn on and off all the time.

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And that's why we also use this as a key shortcut, which is F8.

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Okay, so you'll see it turn on and off with F8 and when you're drawing you will be turning on and off

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snap and offer quite a lot.

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So F3 and F8, you'll be turning on and off quite a lot.

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Okay.

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And that's something to get used to.

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So I want you now to just using your line.

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If a line or polyline doesn't matter in this case, practice those ortho settings at the right angles

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and the oh snap settings.

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So moving from midpoints and intersections and end points and that kind of thing and get used to using

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them and also turning them on and off.

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Remember, it's F3 to turn.

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Oh snap on and off and F8.

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Okay, so that's something to practice.

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Just do that with some lines and when you've got used to it, I'll see you in the next chapter.